mfd: rtsx: Support RTS5249

RTS5249 supports SD UHS-II interface.

In order to support SD UHS-II，the definitions of some internal
registers of RTS5249 have to be modified and are different from its
predecessors. So we need this patch to ensure RTS5249 can work, even
SD/MMC stack doesn't support UHS-II interface.

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index f62a583..0676566 100644 (file)
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -12,7 +12,7 @@ obj-$(CONFIG_MFD_CROS_EC)     += cros_ec.o
 obj-$(CONFIG_MFD_CROS_EC_I2C)  += cros_ec_i2c.o
 obj-$(CONFIG_MFD_CROS_EC_SPI)  += cros_ec_spi.o
 
-rtsx_pci-objs                  := rtsx_pcr.o rts5209.o rts5229.o rtl8411.o rts5227.o
+rtsx_pci-objs                  := rtsx_pcr.o rts5209.o rts5229.o rtl8411.o rts5227.o rts5249.o
 obj-$(CONFIG_MFD_RTSX_PCI)     += rtsx_pci.o
 
 obj-$(CONFIG_HTC_EGPIO)                += htc-egpio.o

diff --git a/drivers/mfd/rts5249.c b/drivers/mfd/rts5249.c
new file mode 100644 (file)
index 0000000..15dc848
--- /dev/null
+++ b/drivers/mfd/rts5249.c
@@ -0,0 +1,241 @@
+/* Driver for Realtek PCI-Express card reader
+ *
+ * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * 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, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ *   Wei WANG <wei_wang@realsil.com.cn>
+ *   No. 128, West Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/mfd/rtsx_pci.h>
+
+#include "rtsx_pcr.h"
+
+static u8 rts5249_get_ic_version(struct rtsx_pcr *pcr)
+{
+       u8 val;
+
+       rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
+       return val & 0x0F;
+}
+
+static int rts5249_extra_init_hw(struct rtsx_pcr *pcr)
+{
+       rtsx_pci_init_cmd(pcr);
+
+       /* Configure GPIO as output */
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
+       /* Switch LDO3318 source from DV33 to card_3v3 */
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
+       /* LED shine disabled, set initial shine cycle period */
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
+       /* Correct driving */
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+                       SD30_CLK_DRIVE_SEL, 0xFF, 0x99);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+                       SD30_CMD_DRIVE_SEL, 0xFF, 0x99);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+                       SD30_DAT_DRIVE_SEL, 0xFF, 0x92);
+
+       return rtsx_pci_send_cmd(pcr, 100);
+}
+
+static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
+{
+       int err;
+
+       err = rtsx_pci_write_phy_register(pcr, PHY_REG_REV, 0xFE46);
+       if (err < 0)
+               return err;
+
+       msleep(1);
+
+       return rtsx_pci_write_phy_register(pcr, PHY_BPCR, 0x05C0);
+}
+
+static int rts5249_turn_on_led(struct rtsx_pcr *pcr)
+{
+       return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
+}
+
+static int rts5249_turn_off_led(struct rtsx_pcr *pcr)
+{
+       return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
+}
+
+static int rts5249_enable_auto_blink(struct rtsx_pcr *pcr)
+{
+       return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
+}
+
+static int rts5249_disable_auto_blink(struct rtsx_pcr *pcr)
+{
+       return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
+}
+
+static int rts5249_card_power_on(struct rtsx_pcr *pcr, int card)
+{
+       int err;
+
+       rtsx_pci_init_cmd(pcr);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+                       SD_POWER_MASK, SD_VCC_PARTIAL_POWER_ON);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+                       LDO3318_PWR_MASK, 0x02);
+       err = rtsx_pci_send_cmd(pcr, 100);
+       if (err < 0)
+               return err;
+
+       msleep(5);
+
+       rtsx_pci_init_cmd(pcr);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+                       SD_POWER_MASK, SD_VCC_POWER_ON);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+                       LDO3318_PWR_MASK, 0x06);
+       err = rtsx_pci_send_cmd(pcr, 100);
+       if (err < 0)
+               return err;
+
+       return 0;
+}
+
+static int rts5249_card_power_off(struct rtsx_pcr *pcr, int card)
+{
+       rtsx_pci_init_cmd(pcr);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+                       SD_POWER_MASK, SD_POWER_OFF);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+                       LDO3318_PWR_MASK, 0x00);
+       return rtsx_pci_send_cmd(pcr, 100);
+}
+
+static int rts5249_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
+{
+       int err;
+       u8 clk_drive, cmd_drive, dat_drive;
+
+       if (voltage == OUTPUT_3V3) {
+               err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4FC0 | 0x24);
+               if (err < 0)
+                       return err;
+               clk_drive = 0x99;
+               cmd_drive = 0x99;
+               dat_drive = 0x92;
+       } else if (voltage == OUTPUT_1V8) {
+               err = rtsx_pci_write_phy_register(pcr, PHY_BACR, 0x3C02);
+               if (err < 0)
+                       return err;
+               err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4C40 | 0x24);
+               if (err < 0)
+                       return err;
+               clk_drive = 0xb3;
+               cmd_drive = 0xb3;
+               dat_drive = 0xb3;
+       } else {
+               return -EINVAL;
+       }
+
+       /* set pad drive */
+       rtsx_pci_init_cmd(pcr);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CLK_DRIVE_SEL,
+                       0xFF, clk_drive);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL,
+                       0xFF, cmd_drive);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL,
+                       0xFF, dat_drive);
+       return rtsx_pci_send_cmd(pcr, 100);
+}
+
+static const struct pcr_ops rts5249_pcr_ops = {
+       .extra_init_hw = rts5249_extra_init_hw,
+       .optimize_phy = rts5249_optimize_phy,
+       .turn_on_led = rts5249_turn_on_led,
+       .turn_off_led = rts5249_turn_off_led,
+       .enable_auto_blink = rts5249_enable_auto_blink,
+       .disable_auto_blink = rts5249_disable_auto_blink,
+       .card_power_on = rts5249_card_power_on,
+       .card_power_off = rts5249_card_power_off,
+       .switch_output_voltage = rts5249_switch_output_voltage,
+};
+
+/* SD Pull Control Enable:
+ *     SD_DAT[3:0] ==> pull up
+ *     SD_CD       ==> pull up
+ *     SD_WP       ==> pull up
+ *     SD_CMD      ==> pull up
+ *     SD_CLK      ==> pull down
+ */
+static const u32 rts5249_sd_pull_ctl_enable_tbl[] = {
+       RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
+       RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
+       RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
+       RTSX_REG_PAIR(CARD_PULL_CTL4, 0xAA),
+       0,
+};
+
+/* SD Pull Control Disable:
+ *     SD_DAT[3:0] ==> pull down
+ *     SD_CD       ==> pull up
+ *     SD_WP       ==> pull down
+ *     SD_CMD      ==> pull down
+ *     SD_CLK      ==> pull down
+ */
+static const u32 rts5249_sd_pull_ctl_disable_tbl[] = {
+       RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
+       RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
+       RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
+       RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
+       0,
+};
+
+/* MS Pull Control Enable:
+ *     MS CD       ==> pull up
+ *     others      ==> pull down
+ */
+static const u32 rts5249_ms_pull_ctl_enable_tbl[] = {
+       RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
+       RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
+       RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
+       0,
+};
+
+/* MS Pull Control Disable:
+ *     MS CD       ==> pull up
+ *     others      ==> pull down
+ */
+static const u32 rts5249_ms_pull_ctl_disable_tbl[] = {
+       RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
+       RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
+       RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
+       0,
+};
+
+void rts5249_init_params(struct rtsx_pcr *pcr)
+{
+       pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
+       pcr->num_slots = 2;
+       pcr->ops = &rts5249_pcr_ops;
+
+       pcr->ic_version = rts5249_get_ic_version(pcr);
+       pcr->sd_pull_ctl_enable_tbl = rts5249_sd_pull_ctl_enable_tbl;
+       pcr->sd_pull_ctl_disable_tbl = rts5249_sd_pull_ctl_disable_tbl;
+       pcr->ms_pull_ctl_enable_tbl = rts5249_ms_pull_ctl_enable_tbl;
+       pcr->ms_pull_ctl_disable_tbl = rts5249_ms_pull_ctl_disable_tbl;
+}

diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index 578a113..e968c01 100644 (file)
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -56,6 +56,7 @@ static DEFINE_PCI_DEVICE_TABLE(rtsx_pci_ids) = {
        { PCI_DEVICE(0x10EC, 0x5229), PCI_CLASS_OTHERS << 16, 0xFF0000 },
        { PCI_DEVICE(0x10EC, 0x5289), PCI_CLASS_OTHERS << 16, 0xFF0000 },
        { PCI_DEVICE(0x10EC, 0x5227), PCI_CLASS_OTHERS << 16, 0xFF0000 },
+       { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
        { 0, }
 };
 
@@ -1033,6 +1034,10 @@ static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
        case 0x5227:
                rts5227_init_params(pcr);
                break;
+
+       case 0x5249:
+               rts5249_init_params(pcr);
+               break;
        }
 
        dev_dbg(&(pcr->pci->dev), "PID: 0x%04x, IC version: 0x%02x\n",

diff --git a/drivers/mfd/rtsx_pcr.h b/drivers/mfd/rtsx_pcr.h
index 2b3ab8a..55fcfc2 100644 (file)
--- a/drivers/mfd/rtsx_pcr.h
+++ b/drivers/mfd/rtsx_pcr.h
@@ -32,5 +32,6 @@ void rts5209_init_params(struct rtsx_pcr *pcr);
 void rts5229_init_params(struct rtsx_pcr *pcr);
 void rtl8411_init_params(struct rtsx_pcr *pcr);
 void rts5227_init_params(struct rtsx_pcr *pcr);
+void rts5249_init_params(struct rtsx_pcr *pcr);
 
 #endif

diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
index 26ea7f1..86bc635 100644 (file)
--- a/include/linux/mfd/rtsx_pci.h
+++ b/include/linux/mfd/rtsx_pci.h
@@ -500,6 +500,8 @@
 #define BPP_POWER_15_PERCENT_ON                0x08
 #define BPP_POWER_ON                   0x00
 #define BPP_POWER_MASK                 0x0F
+#define SD_VCC_PARTIAL_POWER_ON                0x02
+#define SD_VCC_POWER_ON                        0x00
 
 /* PWR_GATE_CTRL */
 #define PWR_GATE_EN                    0x01
@@ -689,6 +691,40 @@
 #define IMAGE_FLAG_ADDR0               0xCE80
 #define IMAGE_FLAG_ADDR1               0xCE81
 
+/* Phy register */
+#define PHY_PCR                                0x00
+#define PHY_RCR0                       0x01
+#define PHY_RCR1                       0x02
+#define PHY_RCR2                       0x03
+#define PHY_RTCR                       0x04
+#define PHY_RDR                                0x05
+#define PHY_TCR0                       0x06
+#define PHY_TCR1                       0x07
+#define PHY_TUNE                       0x08
+#define PHY_IMR                                0x09
+#define PHY_BPCR                       0x0A
+#define PHY_BIST                       0x0B
+#define PHY_RAW_L                      0x0C
+#define PHY_RAW_H                      0x0D
+#define PHY_RAW_DATA                   0x0E
+#define PHY_HOST_CLK_CTRL              0x0F
+#define PHY_DMR                                0x10
+#define PHY_BACR                       0x11
+#define PHY_IER                                0x12
+#define PHY_BCSR                       0x13
+#define PHY_BPR                                0x14
+#define PHY_BPNR2                      0x15
+#define PHY_BPNR                       0x16
+#define PHY_BRNR2                      0x17
+#define PHY_BENR                       0x18
+#define PHY_REG_REV                    0x19
+#define PHY_FLD0                       0x1A
+#define PHY_FLD1                       0x1B
+#define PHY_FLD2                       0x1C
+#define PHY_FLD3                       0x1D
+#define PHY_FLD4                       0x1E
+#define PHY_DUM_REG                    0x1F
+
 #define rtsx_pci_init_cmd(pcr)         ((pcr)->ci = 0)
 
 struct rtsx_pcr;