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List: linux-mmc
Subject: [PATCH 6/7] mmc: core: Implement content of UHS-II card initialization functions
From: Jason Lai <jasonlai.genesyslogic () gmail ! com>
Date: 2021-08-31 11:02:27
Message-ID: 20210831110227.50780-1-jasonlai.genesyslogic () gmail ! com
[Download RAW message or body]
From: Jason Lai <jason.lai@genesyslogic.com.tw>
From: Jason Lai <jason.lai@genesyslogic.com.tw>
UHS-II card initialization flow is divided into 2 categories: PHY & Card.
Part 1 - PHY Initialization:
Every host controller may need their own avtivation operation
to establish LINK between controller and card. So we add a new
member function(uhs2_detect_init) in struct mmc_host_ops for host
controller use.
Part 2 - Card Initialization:
This part can be divided into 6 substeps.
1. Send UHS-II CCMD DEVICE_INIT to card.
2. Send UHS-II CCMD ENUMERATE to card.
3. Send UHS-II Native Read CCMD to obtain capabilities in CFG_REG
of card.
4. Host compares capabilities of host controller and card,
then write the negotiated values to Setting field in CFG_REG
of card through UHS-II Native Write CCMD.
5. Switch host controller's clock to Range B if it is supported
by both host controller and card.
6. Execute legacy SD initialization flow.
Signed-off-by: Jason Lai <jason.lai@genesyslogic.com.tw>
---
drivers/mmc/core/sd_uhs2.c | 918 +++++++++++++++++++++++++++++++++++--
1 file changed, 868 insertions(+), 50 deletions(-)
diff --git a/drivers/mmc/core/sd_uhs2.c b/drivers/mmc/core/sd_uhs2.c
index 24aa51a6d..d9ceee20d 100644
--- a/drivers/mmc/core/sd_uhs2.c
+++ b/drivers/mmc/core/sd_uhs2.c
@@ -3,6 +3,7 @@
* Copyright (C) 2021 Linaro Ltd
*
* Author: Ulf Hansson <ulf.hansson@linaro.org>
+ * Author: Jason Lai <jason.lai@genesyslogic.com.tw>
*
* Support for SD UHS-II cards
*/
@@ -10,29 +11,37 @@
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
+#include <linux/mmc/sd_uhs2.h>
#include "core.h"
#include "bus.h"
#include "sd.h"
#include "mmc_ops.h"
+#include "sd_uhs2.h"
static const unsigned int sd_uhs2_freqs[] = { 52000000, 26000000 };
-static int sd_uhs2_set_ios(struct mmc_host *host)
+static void sd_uhs2_set_ios(struct mmc_host *host)
{
struct mmc_ios *ios = &host->ios;
- return host->ops->uhs2_set_ios(host, ios);
+ pr_debug("%s: clock=%uHz, bus_mode=%u, power_mode=%u, ",
+ mmc_hostname(host), ios->clock, ios->bus_mode,
+ ios->power_mode);
+ pr_debug("cs=%u, Vdd=%u, width=%u, timing=%u\n",
+ ios->chip_select, ios->vdd, 1 << ios->bus_width,
+ ios->timing);
+
+ host->ops->uhs2_set_ios(host, ios);
}
-static int sd_uhs2_power_up(struct mmc_host *host)
+static void sd_uhs2_power_up(struct mmc_host *host)
{
host->ios.vdd = fls(host->ocr_avail) - 1;
host->ios.clock = host->f_init;
host->ios.timing = MMC_TIMING_SD_UHS2;
host->ios.power_mode = MMC_POWER_UP;
- return sd_uhs2_set_ios(host);
+ sd_uhs2_set_ios(host);
}
static void sd_uhs2_power_off(struct mmc_host *host)
@@ -45,6 +54,43 @@ static void sd_uhs2_power_off(struct mmc_host *host)
sd_uhs2_set_ios(host);
}
+/*
+ * uhs2_cmd_assemble - assemble and build up uhs2 command
+ * @cmd: MMC command
+ * @uhs2_cmd: UHS2 command
+ * @header: Value of packet header
+ * @arg: Argument of packet
+ * @payload: Payload of packet
+ * @plen: Payload length
+ * @resp: Buffer for response
+ * @resp_len: Response buffer length
+ *
+ * resp is inputted outside which should be a variable created by caller
+ * so caller should handle it. For SD command, there is no uhs2_resp and
+ * response should be stored in resp of mmc_command.
+ */
+static void uhs2_cmd_assemble(struct mmc_command *cmd,
+ struct uhs2_command *uhs2_cmd,
+ u16 header, u16 arg,
+ u32 *payload, u8 plen, u8 *resp, u8 resp_len)
+{
+ uhs2_cmd->header = header;
+ uhs2_cmd->arg = arg;
+ uhs2_cmd->payload = payload;
+ uhs2_cmd->payload_len = plen * sizeof(u32);
+ uhs2_cmd->packet_len = uhs2_cmd->payload_len + 4;
+
+ cmd->uhs2_cmd = uhs2_cmd;
+ cmd->uhs2_resp = resp;
+ cmd->uhs2_resp_len = resp_len;
+
+ pr_debug("%s: uhs2_cmd: header=0x%x arg=0x%x\n",
+ __func__, uhs2_cmd->header, uhs2_cmd->arg);
+ pr_debug("%s: payload_len=%d packet_len=%d resp_len=%d\n",
+ __func__, uhs2_cmd->payload_len, uhs2_cmd->packet_len,
+ cmd->uhs2_resp_len);
+}
+
/*
* Run the phy initialization sequence, which mainly relies on the UHS-II host
* to check that we reach the expected electrical state, between the host and
@@ -52,16 +98,104 @@ static void sd_uhs2_power_off(struct mmc_host *host)
*/
static int sd_uhs2_phy_init(struct mmc_host *host)
{
+ int err = 0;
+
+ /*
+ * Every host controller can assign its own function which is used
+ * to initialize PHY.
+ */
+ if (host->ops->uhs2_detect_init) {
+ err = host->ops->uhs2_detect_init(host)
+ if (err) {
+ pr_err("%s: fail to detect UHS2!\n",
+ mmc_hostname(host));
+ err = UHS2_PHY_INIT_ERR;
+ }
+ }
+
return 0;
}
/*
* Do the early initialization of the card, by sending the device init
-roadcast
- * command and wait for the process to be completed.
+ * broadcast command and wait for the process to be completed.
*/
static int sd_uhs2_dev_init(struct mmc_host *host)
{
+ struct mmc_command cmd = {0};
+ struct uhs2_command uhs2_cmd = {};
+ u32 cnt;
+ u32 dap, gap, gap1;
+ u16 header = 0, arg = 0;
+ u32 payload[1];
+ u8 plen = 1;
+ u8 gd = 0, cf = 1;
+ u8 resp[6] = {0};
+ u8 resp_len = 6;
+ int err;
+
+ dap = host->uhs2_caps.dap;
+ gap = host->uhs2_caps.gap;
+
+ header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD;
+ arg = ((UHS2_DEV_CMD_DEVICE_INIT & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_WRITE |
+ UHS2_NATIVE_CMD_PLEN_4B |
+ (UHS2_DEV_CMD_DEVICE_INIT >> 8);
+
+ /* need this for some cards */
+ cmd.busy_timeout = 1000;
+
+ for (cnt = 0; cnt < 30; cnt++) {
+ payload[0] = ((dap & 0xF) << 12) |
+ (cf << 11) |
+ ((gd & 0xF) << 4) |
+ (gap & 0xF);
+
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg,
+ payload, plen, resp, resp_len);
+
+ DBG("Begin DEVICE_INIT, header=0x%x, arg=0x%x, payload=0x%x.\n",
+ header, arg, payload[0]);
+
+ DBG("Sending DEVICE_INIT. Count = %d\n", cnt);
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
+ int i;
+
+ pr_warn("%s: DEVICE_INIT response is: ",
+ mmc_hostname(host));
+ for (i = 0; i < resp_len; i++)
+ pr_warn("0x%x ", resp[i]);
+ pr_warn("\n");
+ }
+
+ if (resp[3] != (UHS2_DEV_CMD_DEVICE_INIT & 0xFF)) {
+ pr_err("%s: DEVICE_INIT response is wrong!\n",
+ mmc_hostname(host));
+ return -EIO;
+ }
+
+ if (resp[5] & 0x8) {
+ DBG("CF is set, device is initialized!\n");
+ host->group_desc = gd;
+ break;
+ }
+ gap1 = resp[4] & 0x0F;
+ if (gap == gap1)
+ gd++;
+ }
+ if (cnt == 30) {
+ pr_err("%s: DEVICE_INIT fail, already 30 times!\n",
+ mmc_hostname(host));
+ return -EIO;
+ }
+
return 0;
}
@@ -70,8 +204,60 @@ static int sd_uhs2_dev_init(struct mmc_host *host)
* Note that, we currently support only the point to point connection, which
* means only one card can be attached per host/slot.
*/
-static int sd_uhs2_enum(struct mmc_host *host, u32 *node_id)
+static int sd_uhs2_enum(struct mmc_host *host)
{
+ struct mmc_command cmd = {0};
+ struct uhs2_command uhs2_cmd = {};
+ u16 header = 0, arg = 0;
+ u32 payload[1];
+ u8 plen = 1;
+ u8 id_f = 0xF, id_l = 0x0;
+ u8 resp[8] = {0};
+ u8 resp_len = 8;
+ int err;
+
+ header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD;
+ arg = ((UHS2_DEV_CMD_ENUMERATE & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_WRITE |
+ UHS2_NATIVE_CMD_PLEN_4B |
+ (UHS2_DEV_CMD_ENUMERATE >> 8);
+
+ payload[0] = (id_f << 4) | id_l;
+
+ DBG("Begin ENUMERATE, header=0x%x, arg=0x%x, payload=0x%x.\n",
+ header, arg, payload[0]);
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen,
+ resp, resp_len);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
+ int i;
+
+ pr_warn("%s: ENUMERATE response is: ", mmc_hostname(host));
+ for (i = 0; i < resp_len; i++)
+ pr_warn("0x%x ", resp[i]);
+ pr_warn("\n");
+ }
+
+ if (resp[3] != (UHS2_DEV_CMD_ENUMERATE & 0xFF)) {
+ pr_err("%s: ENUMERATE response is wrong!\n",
+ mmc_hostname(host));
+ return -EIO;
+ }
+
+ id_f = (resp[4] >> 4) & 0xF;
+ id_l = resp[4] & 0xF;
+ DBG("id_f = %d, id_l = %d.\n", id_f, id_l);
+ DBG("Enumerate Cmd Completed. No. of Devices connected = %d\n",
+ id_l - id_f + 1);
+ host->uhs2_dev_prop.node_id = id_f;
+
return 0;
}
@@ -80,8 +266,158 @@ static int sd_uhs2_enum(struct mmc_host *host, u32 *node_id)
* commands and by parsing the responses. Store a copy of the relevant data in
* card->uhs2_config.
*/
-static int sd_uhs2_config_read(struct mmc_host *host, struct mmc_card *card)
+static int sd_uhs2_config_read(struct mmc_host *host)
{
+ struct mmc_command cmd = {0};
+ struct uhs2_command uhs2_cmd = {};
+ u16 header = 0, arg = 0;
+ u32 cap;
+ int err;
+
+ DBG("INQUIRY_CFG: read Generic Caps.\n");
+ header = UHS2_NATIVE_PACKET |
+ UHS2_PACKET_TYPE_CCMD |
+ host->uhs2_dev_prop.node_id;
+ arg = ((UHS2_DEV_CONFIG_GEN_CAPS & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_READ |
+ UHS2_NATIVE_CMD_PLEN_4B |
+ (UHS2_DEV_CONFIG_GEN_CAPS >> 8);
+
+ pr_debug("Begin INQUIRY_CFG, header=0x%x, arg=0x%x.\n", header, arg);
+ /* There is no payload because per spec, there should be
+ * no payload field for read CCMD.
+ * Plen is set in arg. Per spec, plen for read CCMD
+ * represents the len of read data which is assigned in payload
+ * of following RES (p136).
+ */
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, NULL, 0, NULL, 0);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
+ int i;
+
+ pr_warn("%s: INQUIRY_CFG generic response is: ",
+ mmc_hostname(host));
+ for (i = 0; i < 2; i++)
+ pr_warn("0x%x ", cmd.resp[i]);
+ pr_warn("\n");
+ }
+
+ cap = cmd.resp[0];
+ pr_debug("Device Generic Caps (0-31) is: 0x%x.\n", cap);
+ host->uhs2_dev_prop.n_lanes = (cap >> UHS2_DEV_CONFIG_N_LANES_POS) &
+ UHS2_DEV_CONFIG_N_LANES_MASK;
+ host->uhs2_dev_prop.dadr_len = (cap >> UHS2_DEV_CONFIG_DADR_POS) &
+ UHS2_DEV_CONFIG_DADR_MASK;
+ host->uhs2_dev_prop.app_type = (cap >> UHS2_DEV_CONFIG_APP_POS) &
+ UHS2_DEV_CONFIG_APP_MASK;
+
+ pr_debug("INQUIRY_CFG: read PHY Caps.\n");
+ arg = ((UHS2_DEV_CONFIG_PHY_CAPS & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_READ |
+ UHS2_NATIVE_CMD_PLEN_8B |
+ (UHS2_DEV_CONFIG_PHY_CAPS >> 8);
+
+ pr_debug("Begin INQUIRY_CFG, header=0x%x, arg=0x%x.\n", header, arg);
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, NULL, 0, NULL, 0);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
+ int i;
+
+ pr_warn("%s: INQUIRY_CFG PHY response is: ",
+ mmc_hostname(host));
+ for (i = 0; i < 2; i++)
+ pr_warn("0x%x ", cmd.resp[i]);
+ pr_warn("\n");
+ }
+
+ cap = cmd.resp[0];
+ pr_debug("Device PHY Caps (0-31) is: 0x%x.\n", cap);
+ host->uhs2_dev_prop.phy_minor_rev = cap &
+ UHS2_DEV_CONFIG_PHY_MINOR_MASK;
+ host->uhs2_dev_prop.phy_major_rev = (cap >>
+ UHS2_DEV_CONFIG_PHY_MAJOR_POS) &
+ UHS2_DEV_CONFIG_PHY_MAJOR_MASK;
+ host->uhs2_dev_prop.can_hibernate = (cap >>
+ UHS2_DEV_CONFIG_CAN_HIBER_POS) &
+ UHS2_DEV_CONFIG_CAN_HIBER_MASK;
+
+ cap = cmd.resp[1];
+ pr_debug("Device PHY Caps (32-63) is: 0x%x.\n", cap);
+ host->uhs2_dev_prop.n_lss_sync = cap & UHS2_DEV_CONFIG_N_LSS_SYN_MASK;
+ host->uhs2_dev_prop.n_lss_dir = (cap >>
+ UHS2_DEV_CONFIG_N_LSS_DIR_POS) &
+ UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
+ if (host->uhs2_dev_prop.n_lss_sync == 0)
+ host->uhs2_dev_prop.n_lss_sync = 16 << 2;
+ else
+ host->uhs2_dev_prop.n_lss_sync <<= 2;
+
+ if (host->uhs2_dev_prop.n_lss_dir == 0)
+ host->uhs2_dev_prop.n_lss_dir = 16 << 3;
+ else
+ host->uhs2_dev_prop.n_lss_dir <<= 3;
+
+ pr_debug("INQUIRY_CFG: read LINK-TRAN Caps.\n");
+ arg = ((UHS2_DEV_CONFIG_LINK_TRAN_CAPS & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_READ |
+ UHS2_NATIVE_CMD_PLEN_8B |
+ (UHS2_DEV_CONFIG_LINK_TRAN_CAPS >> 8);
+
+ pr_debug("Begin INQUIRY_CFG, header=0x%x, arg=0x%x.\n", header, arg);
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, NULL, 0, NULL, 0);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
+ int i;
+
+ pr_warn("%s: INQUIRY_CFG Link-Tran response is: ",
+ mmc_hostname(host));
+ for (i = 0; i < 2; i++)
+ pr_warn("0x%x ", cmd.resp[i]);
+ pr_warn("\n");
+ }
+
+ cap = cmd.resp[0];
+ DBG("Device LINK-TRAN Caps (0-31) is: 0x%x.\n", cap);
+ host->uhs2_dev_prop.link_minor_rev = cap &
+ UHS2_DEV_CONFIG_LT_MINOR_MASK;
+ host->uhs2_dev_prop.link_major_rev = (cap >>
+ UHS2_DEV_CONFIG_LT_MAJOR_POS) &
+ UHS2_DEV_CONFIG_LT_MAJOR_MASK;
+ host->uhs2_dev_prop.n_fcu = (cap >> UHS2_DEV_CONFIG_N_FCU_POS) &
+ UHS2_DEV_CONFIG_N_FCU_MASK;
+ host->uhs2_dev_prop.dev_type = (cap >> UHS2_DEV_CONFIG_DEV_TYPE_POS) &
+ UHS2_DEV_CONFIG_DEV_TYPE_MASK;
+ host->uhs2_dev_prop.maxblk_len = (cap >>
+ UHS2_DEV_CONFIG_MAX_BLK_LEN_POS) &
+ UHS2_DEV_CONFIG_MAX_BLK_LEN_MASK;
+
+ cap = cmd.resp[1];
+ DBG("Device LINK-TRAN Caps (32-63) is: 0x%x.\n", cap);
+ host->uhs2_dev_prop.n_data_gap = cap & UHS2_DEV_CONFIG_N_DATA_GAP_MASK;
+ if (host->uhs2_dev_prop.n_fcu == 0)
+ host->uhs2_dev_prop.n_fcu = 256;
+
return 0;
}
@@ -89,15 +425,393 @@ static int sd_uhs2_config_read(struct mmc_host *host, struct mmc_card *card)
* Based on the card's and host's UHS-II capabilities, let's update the
* configuration of the card and the host. This may also include to move to a
* greater speed range/mode. Depending on the updated configuration, we may
-eed
- * to do a soft reset of the card via sending it a GO_DORMANT_STATE command.
+ * need to do a soft reset of the card via sending it a GO_DORMANT_STATE command.
*
- * In the final step, let's check if the card signals "config completion",
-hich
- * indicates that the card has moved from config state into active state.
+ * In the final step, let's check if the card signals "config completion",
+ * which indicates that the card has moved from config state into active state.
*/
-static int sd_uhs2_config_write(struct mmc_host *host, struct mmc_card *card)
+static int sd_uhs2_config_write(struct mmc_host *host)
+{
+ struct mmc_command cmd = {0};
+ struct uhs2_command uhs2_cmd = {};
+ u16 header = 0, arg = 0;
+ u32 payload[2];
+ u8 nMinDataGap;
+ u8 plen;
+ u8 try;
+ int err;
+ u8 resp[5] = {0};
+ u8 resp_len = 5;
+
+ pr_debug("SET_COMMON_CFG: write Generic Settings.\n");
+ header = UHS2_NATIVE_PACKET |
+ UHS2_PACKET_TYPE_CCMD | host->uhs2_dev_prop.node_id;
+ arg = ((UHS2_DEV_CONFIG_GEN_SET & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_WRITE |
+ UHS2_NATIVE_CMD_PLEN_8B |
+ (UHS2_DEV_CONFIG_GEN_SET >> 8);
+
+ if (host->uhs2_dev_prop.n_lanes == UHS2_DEV_CONFIG_2L_HD_FD &&
+ host->uhs2_caps.n_lanes == UHS2_DEV_CONFIG_2L_HD_FD) {
+ /* Support HD */
+ pr_debug("Both Host and device support 2L-HD.\n");
+ host->flags |= MMC_UHS2_2L_HD;
+ host->uhs2_caps.n_lanes_set = UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
+ host->uhs2_dev_prop.n_lanes_set =
+ UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
+ nMinDataGap = 1;
+ } else {
+ /* Only support 2L-FD so far */
+ host->flags &= ~MMC_UHS2_2L_HD;
+ host->uhs2_caps.n_lanes_set = UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
+ host->uhs2_dev_prop.n_lanes_set =
+ UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
+ nMinDataGap = 3;
+ }
+
+ plen = 2;
+ payload[0] = host->uhs2_dev_prop.n_lanes_set <<
+ UHS2_DEV_CONFIG_N_LANES_POS;
+ payload[1] = 0;
+ payload[0] = cpu_to_be32(payload[0]);
+ payload[1] = cpu_to_be32(payload[1]);
+
+ pr_debug("Begin SET_COMMON_CFG, header=0x%x, arg=0x%x\n", header, arg);
+ pr_debug("UHS2 write Generic Settings %08x %08x\n",
+ payload[0], payload[1]);
+ pr_debug("flags=%08x, ", host->flags);
+ pr_debug("host_caps.n_lanes_set%x, ", host->uhs2_caps.n_lanes_set);
+ pr_debug("dev_prop.n_lanes_set=%x\n", host->uhs2_dev_prop.n_lanes_set);
+
+ /*
+ * There is no payload because per spec, there should be
+ * no payload field for read CCMD.
+ * Plen is set in arg. Per spec, plen for read CCMD
+ * represents the len of read data which is assigned in payload
+ * of following RES (p136).
+ */
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen, NULL, 0);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ pr_debug("SET_COMMON_CFG: PHY Settings.\n");
+ arg = ((UHS2_DEV_CONFIG_PHY_SET & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_WRITE |
+ UHS2_NATIVE_CMD_PLEN_8B |
+ (UHS2_DEV_CONFIG_PHY_SET >> 8);
+
+ for (try = 0; try < 2; try++) {
+ plen = 2;
+
+ if (host->uhs2_caps.speed_range ==
+ UHS2_DEV_CONFIG_PHY_SET_SPEED_B) {
+ host->flags |= MMC_UHS2_SPEED_B;
+ host->uhs2_dev_prop.speed_range_set =
+ UHS2_DEV_CONFIG_PHY_SET_SPEED_B;
+ pr_debug("set dev_prop.speed_range_set to SPEED_B\n");
+ } else {
+ host->uhs2_dev_prop.speed_range_set =
+ UHS2_DEV_CONFIG_PHY_SET_SPEED_A;
+ host->flags &= ~MMC_UHS2_SPEED_B;
+ pr_debug("set dev_prop.speed_range_set to SPEED_A\n");
+ }
+
+ payload[0] = host->uhs2_dev_prop.speed_range_set <<
+ UHS2_DEV_CONFIG_PHY_SET_SPEED_POS;
+
+ host->uhs2_dev_prop.n_lss_sync_set =
+ (min(host->uhs2_dev_prop.n_lss_sync,
+ host->uhs2_caps.n_lss_sync) >> 2) &
+ UHS2_DEV_CONFIG_N_LSS_SYN_MASK;
+ host->uhs2_caps.n_lss_sync_set =
+ host->uhs2_dev_prop.n_lss_sync_set;
+
+ if (try == 0) {
+ host->uhs2_caps.n_lss_dir_set =
+ (host->uhs2_dev_prop.n_lss_dir >> 3) &
+ UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
+ host->uhs2_dev_prop.n_lss_dir_set =
+ ((host->uhs2_caps.n_lss_dir >> 3) + 1) &
+ UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
+ } else {
+ host->uhs2_dev_prop.n_lss_dir_set =
+ (max(host->uhs2_dev_prop.n_lss_dir,
+ host->uhs2_caps.n_lss_dir) >> 3) &
+ UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
+ host->uhs2_caps.n_lss_dir_set =
+ host->uhs2_dev_prop.n_lss_dir_set;
+ payload[1] = (host->uhs2_dev_prop.n_lss_dir_set <<
+ UHS2_DEV_CONFIG_N_LSS_DIR_POS) |
+ host->uhs2_dev_prop.n_lss_sync_set;
+ }
+
+ payload[1] = (host->uhs2_dev_prop.n_lss_dir_set <<
+ UHS2_DEV_CONFIG_N_LSS_DIR_POS) |
+ host->uhs2_dev_prop.n_lss_sync_set;
+ payload[0] = cpu_to_be32(payload[0]);
+ payload[1] = cpu_to_be32(payload[1]);
+
+ pr_debug("UHS2 SET PHY Settings %08x %08x\n",
+ payload[0], payload[1]);
+ pr_debug("host->flags=%08x dev_prop.speed_range_set=%x\n",
+ host->flags,
+ host->uhs2_dev_prop.speed_range_set);
+ pr_debug("dev_prop.n_lss_sync_set=%x host_caps.n_lss_sync_set=%x\n",
+ host->uhs2_dev_prop.n_lss_sync_set,
+ host->uhs2_caps.n_lss_sync_set);
+ pr_debug("dev_prop.n_lss_dir_set=%x host_caps.n_lss_dir_set=%x\n",
+ host->uhs2_dev_prop.n_lss_dir_set,
+ host->uhs2_caps.n_lss_dir_set);
+
+ pr_debug("Begin SET_COMMON_CFG header=0x%x arg=0x%x\n",
+ header, arg);
+ pr_debug("\t\tpayload[0]=0x%x payload[1]=0x%x\n",
+ payload[0], payload[1]);
+
+ resp_len = 4;
+ memset(resp, 0, sizeof(resp));
+
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg,
+ payload, plen, resp, resp_len);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ if (!(resp[2] & 0x80))
+ break;
+
+ pr_debug("%s: %s: UHS2 SET PHY Settings fail, res= 0x%x!\n",
+ mmc_hostname(host), __func__, resp[2]);
+ }
+
+ pr_debug("SET_COMMON_CFG: LINK-TRAN Settings.\n");
+ arg = ((UHS2_DEV_CONFIG_LINK_TRAN_SET & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_WRITE |
+ UHS2_NATIVE_CMD_PLEN_8B |
+ (UHS2_DEV_CONFIG_LINK_TRAN_SET >> 8);
+
+ plen = 2;
+
+ if (host->uhs2_dev_prop.app_type == UHS2_DEV_CONFIG_APP_SD_MEM)
+ host->uhs2_dev_prop.maxblk_len_set =
+ UHS2_DEV_CONFIG_LT_SET_MAX_BLK_LEN;
+ else
+ host->uhs2_dev_prop.maxblk_len_set =
+ min(host->uhs2_dev_prop.maxblk_len,
+ host->uhs2_caps.maxblk_len);
+ host->uhs2_caps.maxblk_len_set = host->uhs2_dev_prop.maxblk_len_set;
+
+ host->uhs2_dev_prop.n_fcu_set =
+ min(host->uhs2_dev_prop.n_fcu,
+ host->uhs2_caps.n_fcu);
+ host->uhs2_caps.n_fcu_set = host->uhs2_dev_prop.n_fcu_set;
+
+ host->uhs2_dev_prop.n_data_gap_set =
+ max(nMinDataGap, host->uhs2_dev_prop.n_data_gap);
+
+ host->uhs2_caps.n_data_gap_set = host->uhs2_dev_prop.n_data_gap_set;
+
+ host->uhs2_caps.max_retry_set = 3;
+ host->uhs2_dev_prop.max_retry_set = host->uhs2_caps.max_retry_set;
+
+ payload[0] = (host->uhs2_dev_prop.maxblk_len_set <<
+ UHS2_DEV_CONFIG_MAX_BLK_LEN_POS) |
+ (host->uhs2_dev_prop.max_retry_set <<
+ UHS2_DEV_CONFIG_LT_SET_MAX_RETRY_POS) |
+ (host->uhs2_dev_prop.n_fcu_set <<
+ UHS2_DEV_CONFIG_N_FCU_POS);
+ payload[1] = host->uhs2_dev_prop.n_data_gap_set;
+ payload[0] = cpu_to_be32(payload[0]);
+ payload[1] = cpu_to_be32(payload[1]);
+
+ pr_debug("Begin SET_COMMON_CFG header=0x%x arg=0x%x\n", header, arg);
+ pr_debug("\t\tpayload[0]=0x%x payload[1]=0x%x\n",
+ payload[0], payload[1]);
+
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen, NULL, 0);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ pr_debug("SET_COMMON_CFG: Set Config Completion.\n");
+ arg = ((UHS2_DEV_CONFIG_GEN_SET & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_WRITE |
+ UHS2_NATIVE_CMD_PLEN_8B |
+ (UHS2_DEV_CONFIG_GEN_SET >> 8);
+
+ plen = 2;
+ payload[0] = 0;
+ payload[1] = UHS2_DEV_CONFIG_GEN_SET_CFG_COMPLETE;
+ payload[0] = cpu_to_be32(payload[0]);
+ payload[1] = cpu_to_be32(payload[1]);
+
+ pr_debug("Begin SET_COMMON_CFG, ");
+ pr_debug("header=0x%x, arg=0x%x, payload[0] = 0x%x.\n",
+ header, arg, payload[0]);
+ resp_len = 5;
+ memset(resp, 0, sizeof(resp));
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen,
+ resp, resp_len);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ /* Set host Config Setting registers */
+ if (!host->ops->uhs2_set_reg ||
+ host->ops->uhs2_set_reg(host, SET_CONFIG)) {
+ pr_err("%s: %s: UHS2 SET_CONFIG fail!\n",
+ mmc_hostname(host), __func__);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int uhs2_go_dormant(struct mmc_host *host, bool hibernate)
{
+ struct mmc_command cmd = {0};
+ struct uhs2_command uhs2_cmd = {};
+ u16 header = 0, arg = 0;
+ u32 payload[1];
+ u8 plen = 1;
+ int err;
+
+ /* Disable Normal INT */
+ if (!host->ops->uhs2_set_reg ||
+ host->ops->uhs2_set_reg(host, DISABLE_INT)) {
+ pr_err("%s: %s: UHS2 DISABLE_INT fail!\n",
+ mmc_hostname(host), __func__);
+ return -EIO;
+ }
+
+ header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD |
+ host->uhs2_dev_prop.node_id;
+
+ arg = ((UHS2_DEV_CMD_GO_DORMANT_STATE & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_WRITE |
+ UHS2_NATIVE_CMD_PLEN_4B |
+ (UHS2_DEV_CMD_GO_DORMANT_STATE >> 8);
+
+ if (hibernate)
+ payload[0] = UHS2_DEV_CMD_DORMANT_HIBER;
+
+ pr_debug("Begin GO_DORMANT_STATE, ");
+ pr_debug("header=0x%x, arg=0x%x, payload=0x%x.\n",
+ header, arg, payload[0]);
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen, NULL, 0);
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ /* Check Dormant State in Present */
+ if (!host->ops->uhs2_set_reg ||
+ host->ops->uhs2_set_reg(host, CHECK_DORMANT)) {
+ pr_err("%s: %s: UHS2 GO_DORMANT_STATE fail!\n",
+ mmc_hostname(host), __func__);
+ return -EIO;
+ }
+
+ if (host->ops->uhs2_disable_clk)
+ host->ops->uhs2_disable_clk(host);
+
+ return 0;
+}
+
+static int uhs2_change_speed(struct mmc_host *host)
+{
+ int err;
+ int timeout = 100;
+
+ /* Change Speed Range at controller side. */
+ if (!host->ops->uhs2_set_reg ||
+ host->ops->uhs2_set_reg(host, SET_SPEED_B)) {
+ pr_err("%s: %s: UHS2 SET_SPEED fail!\n",
+ mmc_hostname(host), __func__);
+ return -EIO;
+ }
+
+ err = uhs2_go_dormant(host, false);
+ if (err) {
+ pr_err("%s: %s: UHS2 GO_DORMANT_STATE fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ /* restore sd clock */
+ mmc_delay(5);
+ if (host->ops->uhs2_enable_clk)
+ host->ops->uhs2_enable_clk(host);
+
+ /* Enable Normal INT */
+ if (!host->ops->uhs2_set_reg ||
+ host->ops->uhs2_set_reg(host, ENABLE_INT)) {
+ pr_err("%s: %s: UHS2 ENABLE_INT fail!\n",
+ mmc_hostname(host), __func__);
+ return -EIO;
+ }
+
+ /*
+ * According to UHS-II Addendum Version 1.01, chapter 6.2.3,
+ * wait card switch to Active State
+ */
+ header = UHS2_NATIVE_PACKET |
+ UHS2_PACKET_TYPE_CCMD | host->uhs2_dev_prop.node_id;
+ arg = ((UHS2_DEV_CONFIG_GEN_SET & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_READ |
+ UHS2_NATIVE_CMD_PLEN_8B |
+ (UHS2_DEV_CONFIG_GEN_SET >> 8);
+ do {
+ uhs2_cmd_assemble(&cmd, &uhs2_cmd,
+ header, arg,
+ NULL, 0,
+ NULL, 0);
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ pr_debug("%s: Device Generic Settings Register=0x%x-0x%x\n",
+ mmc_hostname(host), cmd.resp[0], cmd.resp[1])
+ if (cmd.resp[1] & UHS2_DEV_CONFIG_GEN_SET_CFG_COMPLETE) {
+ pr_debug("%s: %s: UHS2 switch to range B OK\n",
+ mmc_hostname(host), __func__);
+ break;
+ }
+
+ timeout--;
+ if (timeout == 0) {
+ pr_err("%s: %s: UHS2 not switch to Active in 100ms.\n",
+ mmc_hostname(host->mmc), __func__);
+ return -EIO;
+ }
+
+ mmc_delay(1);
+
+ } while (1);
+
return 0;
}
@@ -108,8 +822,67 @@ static int sd_uhs2_config_write(struct mmc_host *host, struct mmc_card *card)
* be set through a legacy CMD6. Note that, the power limit that becomes set,
* survives a soft reset through the GO_DORMANT_STATE command.
*/
-static int sd_uhs2_legacy_init(struct mmc_host *host, struct mmc_card *card)
+static int sd_uhs2_legacy_init(struct mmc_host *host)
{
+ int err;
+ u32 ocr, rocr;
+
+ WARN_ON(!host->claimed);
+
+ /* Send CMD0 to reset SD card */
+ mmc_go_idle(host);
+
+ /* Send CMD8 to communicate SD interface operation condition */
+ err = mmc_send_if_cond(host, host->ocr_avail);
+ if (err) {
+ pr_err("%s: %s: SEND_IF_COND fail!\n",
+ mmc_hostname(host), __func__);
+ return err;
+ }
+
+ /*
+ * Get CID, send relative address, get CSD are the same as legacy
+ * sd, call mmc_sd_init_card() in sd.c directly
+ */
+ err = mmc_send_app_op_cond(host, 0, &ocr);
+ if (err) {
+ pr_err("%s: %s: SD_SEND_OP_COND fail!\n",
+ mmc_hostname(host), __func__);
+ return err;
+ }
+
+ if (host->ocr_avail_sd)
+ host->ocr_avail = host->ocr_avail_sd;
+
+ /*
+ * Some SD cards claims an out of spec VDD voltage range. Let's treat
+ * these bits as being in-valid and especially also bit7.
+ */
+ ocr &= ~0x7FFF;
+ rocr = mmc_select_voltage(host, ocr);
+
+ /*
+ * Some cards have zero value of rocr in UHS-II mode. Assign host's ocr
+ * value to rocr.
+ */
+ if (!rocr) {
+ if (host->ocr_avail) {
+ rocr = host->ocr_avail;
+ } else {
+ pr_err("%s: %s: there is no valid OCR.\n",
+ mmc_hostname(host), __func__);
+ return -EINVAL;
+ }
+ }
+
+ /*
+ * Get CID, send relative address, get CSD are the same as legacy
+ * sd, call mmc_sd_init_card() in sd.c directly
+ */
+ err = mmc_sd_init_card(host, rocr, NULL);
+ if (err) {
+ pr_err("%s: %s: mmc_sd_init_card() fail!\n",
+ mmc_hostname(host), __func__);
+ return err;
+ }
+
return 0;
}
@@ -120,42 +893,49 @@ static int sd_uhs2_legacy_init(struct mmc_host *host, struct mmc_card *card)
static int sd_uhs2_init_card(struct mmc_host *host)
{
struct mmc_card *card;
- u32 node_id;
int err;
err = sd_uhs2_dev_init(host);
- if (err)
+ if (err) {
+ pr_err("%s: UHS2 DEVICE_INIT fail!\n", mmc_hostname(host));
return err;
+ }
- err = sd_uhs2_enum(host, &node_id);
+ err = sd_uhs2_enum(host);
+ if (err) {
+ pr_err("%s: UHS2 ENUMERATE fail!\n", mmc_hostname(host));
+ return err;
+ }
+
+ err = sd_uhs2_config_read(host);
if (err)
return err;
- card = mmc_alloc_card(host, &sd_type);
- if (IS_ERR(card))
- return PTR_ERR(card);
+ err = sd_uhs2_config_write(host);
+ if (err)
+ return err;
- card->uhs2_config.node_id = node_id;
- card->type = MMC_TYPE_SD;
+ /* Delay some time to let card apply new configuration */
+ mmc_delay(10);
- err = sd_uhs2_config_read(host, card);
- if (err)
- goto err;
+ /* Change to Speed Range B if it is supported */
+ if (host->flags & MMC_UHS2_SPEED_B) {
+ err = uhs2_change_speed(host);
+ if (err) {
+ pr_err("%s: %s: UHS2 uhs2_change_speed() fail!\n",
+ mmc_hostname(host), __func__);
+ return err;
+ }
+ }
- err = sd_uhs2_config_write(host, card);
- if (err)
- goto err;
+ host->flags |= MMC_UHS2_INITIALIZED;
- err = sd_uhs2_legacy_init(host, card);
+ err = sd_uhs2_legacy_init(host);
if (err)
- goto err;
+ return err;
host->card = card;
return 0;
-
-err:
- mmc_remove_card(card);
- return err;
}
static void sd_uhs2_remove(struct mmc_host *host)
@@ -234,38 +1014,66 @@ static int sd_uhs2_attach(struct mmc_host *host)
int err;
err = sd_uhs2_power_up(host);
- if (err)
+ if (err) {
+ pr_debug("%s: %s: sd_uhs2_power_up() fail!\n",
+ mmc_hostname(host), __func__);
goto err;
+ }
err = sd_uhs2_phy_init(host);
- if (err)
+ if (err) {
+ pr_debug("%s: %s: sd_uhs2_phy_init() fail!\n",
+ mmc_hostname(host), __func__);
goto err;
+ }
err = sd_uhs2_init_card(host);
- if (err)
+ if (err) {
+ pr_debug("%s: %s: sd_uhs2_init_card() fail!\n",
+ mmc_hostname(host), __func__);
goto err;
+ }
mmc_attach_bus(host, &sd_uhs2_ops);
mmc_release_host(host);
err = mmc_add_card(host->card);
- if (err)
+ if (err) {
+ pr_debug("%s: %s: mmc_add_card() fail!\n",
+ mmc_hostname(host), __func__);
goto remove_card;
+ }
mmc_claim_host(host);
+
+ if (host->ops->uhs2_post_attach_sd)
+ host->ops->uhs2_post_attach_sd(host);
+
return 0;
remove_card:
- mmc_remove_card(host->card);
- host->card = NULL;
+ sd_uhs2_remove(host);
mmc_claim_host(host);
- mmc_detach_bus(host);
+
err:
+ mmc_detach_bus(host);
sd_uhs2_power_off(host);
+ if (host->flags & MMC_UHS2_INITIALIZED)
+ host->flags &= ~MMC_UHS2_INITIALIZED;
+ host->flags &= ~MMC_UHS2_SUPPORT;
return err;
}
+/**
+ * mmc_attach_sd_uhs2 - select UHS2 interface
+ * @host: MMC host
+ *
+ * Try to select UHS2 interface and initialize the bus for a given
+ * frequency, @freq.
+ *
+ * Return: 0 on success, non-zero error on failure
+ */
int mmc_attach_sd_uhs2(struct mmc_host *host)
{
int i, err = 0;
@@ -273,8 +1081,12 @@ int mmc_attach_sd_uhs2(struct mmc_host *host)
if (!(host->caps2 & MMC_CAP2_SD_UHS2))
return -EOPNOTSUPP;
- /* Turn off the legacy SD interface before trying with UHS-II. */
- mmc_power_off(host);
+ host->flags |= MMC_UHS2_SUPPORT;
+
+ if (!(host->caps2 & MMC_CAP2_NO_SDIO))
+ pr_info("mmc_card_sd_uhs2: sdio\n");
+ if (!(host->caps2 & MMC_CAP2_NO_SD))
+ pr_info("mmc_card_sd_uhs2: sd\n");
/*
* Start UHS-II initialization at 52MHz and possibly make a retry at
@@ -282,11 +1094,17 @@ int mmc_attach_sd_uhs2(struct mmc_host *host)
* validates ios->clock, to set a rate within the correct range.
*/
for (i = 0; i < ARRAY_SIZE(sd_uhs2_freqs); i++) {
- host->f_init = sd_uhs2_freqs[i];
- err = sd_uhs2_attach(host);
- if (!err)
- break;
- }
+ host->f_init = sd_uhs2_freqs[i];
+ pr_debug("%s: %s: trying to init card at %u Hz\n",
+ mmc_hostname(host), __func__, host->f_init);
- return err;
+ err = sd_uhs2_attach(host);
+ if (!err)
+ break;
+ else
+ pr_debug("%s: %s: init card at %u Hz failed\n",
+ mmc_hostname(host), __func__,
+ host->f_init);
+ }
+
+ return err;
}
--
2.32.0
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