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Message-ID: <1528809280-31116-7-git-send-email-ludovic.Barre@st.com>
Date: Tue, 12 Jun 2018 15:14:27 +0200
From: Ludovic Barre <ludovic.Barre@...com>
To: Ulf Hansson <ulf.hansson@...aro.org>,
Rob Herring <robh+dt@...nel.org>
CC: Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...com>,
Gerald Baeza <gerald.baeza@...com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-mmc@...r.kernel.org>, Ludovic Barre <ludovic.barre@...com>
Subject: [PATCH 06/19] mmc: mmci: add variant properties to define cpsm & cmdresp bits
From: Ludovic Barre <ludovic.barre@...com>
This patch adds command variant properties to define
cpsm enable bit and responses.
Needed to support the STM32 variant (shift of cpsm bit,
specific definition of commands response).
Signed-off-by: Ludovic Barre <ludovic.barre@...com>
---
drivers/mmc/host/mmci.c | 47 +++++++++++++++++++++++++++++++++++++++++++----
drivers/mmc/host/mmci.h | 8 ++++++++
2 files changed, 51 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 801c86b..52562fc 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -51,6 +51,10 @@ static unsigned int fmax = 515633;
static struct variant_data variant_arm = {
.fifosize = 16 * 4,
.fifohalfsize = 8 * 4,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.datalength_bits = 16,
.datactrl_blocksz = 11,
.pwrreg_powerup = MCI_PWR_UP,
@@ -65,6 +69,10 @@ static struct variant_data variant_arm = {
static struct variant_data variant_arm_extended_fifo = {
.fifosize = 128 * 4,
.fifohalfsize = 64 * 4,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.datalength_bits = 16,
.datactrl_blocksz = 11,
.pwrreg_powerup = MCI_PWR_UP,
@@ -79,6 +87,10 @@ static struct variant_data variant_arm_extended_fifo_hwfc = {
.fifosize = 128 * 4,
.fifohalfsize = 64 * 4,
.clkreg_enable = MCI_ARM_HWFCEN,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.datalength_bits = 16,
.datactrl_blocksz = 11,
.pwrreg_powerup = MCI_PWR_UP,
@@ -94,6 +106,10 @@ static struct variant_data variant_u300 = {
.fifohalfsize = 8 * 4,
.clkreg_enable = MCI_ST_U300_HWFCEN,
.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.datalength_bits = 16,
.datactrl_blocksz = 11,
.datactrl_mask_sdio = MCI_DPSM_ST_SDIOEN,
@@ -114,6 +130,10 @@ static struct variant_data variant_nomadik = {
.fifohalfsize = 8 * 4,
.clkreg = MCI_CLK_ENABLE,
.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.datalength_bits = 24,
.datactrl_blocksz = 11,
.datactrl_mask_sdio = MCI_DPSM_ST_SDIOEN,
@@ -137,6 +157,10 @@ static struct variant_data variant_ux500 = {
.clkreg_enable = MCI_ST_UX500_HWFCEN,
.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
.clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.datalength_bits = 24,
.datactrl_blocksz = 11,
.datactrl_mask_sdio = MCI_DPSM_ST_SDIOEN,
@@ -164,6 +188,10 @@ static struct variant_data variant_ux500v2 = {
.clkreg_enable = MCI_ST_UX500_HWFCEN,
.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
.clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.datactrl_mask_ddrmode = MCI_DPSM_ST_DDRMODE,
.datalength_bits = 24,
.datactrl_blocksz = 11,
@@ -193,6 +221,10 @@ static struct variant_data variant_stm32 = {
.clkreg_enable = MCI_ST_UX500_HWFCEN,
.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
.clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.datalength_bits = 24,
.datactrl_blocksz = 11,
.datactrl_mask_sdio = MCI_DPSM_ST_SDIOEN,
@@ -213,6 +245,10 @@ static struct variant_data variant_qcom = {
MCI_QCOM_CLK_SELECT_IN_FBCLK,
.clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8,
.datactrl_mask_ddrmode = MCI_QCOM_CLK_SELECT_IN_DDR_MODE,
+ .cmdreg_cpsm_enable = MCI_CPSM_ENABLE,
+ .cmdreg_lrsp_crc = MCI_CPSM_RESPONSE | MCI_CPSM_LONGRSP,
+ .cmdreg_srsp_crc = MCI_CPSM_RESPONSE,
+ .cmdreg_srsp = MCI_CPSM_RESPONSE,
.data_cmd_enable = MCI_CPSM_QCOM_DATCMD,
.blksz_datactrl4 = true,
.datalength_bits = 24,
@@ -603,16 +639,19 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
dev_dbg(mmc_dev(host->mmc), "op %02x arg %08x flags %08x\n",
cmd->opcode, cmd->arg, cmd->flags);
- if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) {
+ if (readl(base + MMCICOMMAND) & host->variant->cmdreg_cpsm_enable) {
writel(0, base + MMCICOMMAND);
mmci_reg_delay(host);
}
- c |= cmd->opcode | MCI_CPSM_ENABLE;
+ c |= cmd->opcode | host->variant->cmdreg_cpsm_enable;
if (cmd->flags & MMC_RSP_PRESENT) {
if (cmd->flags & MMC_RSP_136)
- c |= MCI_CPSM_LONGRSP;
- c |= MCI_CPSM_RESPONSE;
+ c |= host->variant->cmdreg_lrsp_crc;
+ else if (cmd->flags & MMC_RSP_CRC)
+ c |= host->variant->cmdreg_srsp_crc;
+ else
+ c |= host->variant->cmdreg_srsp;
}
if (/*interrupt*/0)
c |= MCI_CPSM_INTERRUPT;
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 7265ca6..e173305 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -239,6 +239,10 @@ struct mmci_host;
* @clkreg_enable: enable value for MMCICLOCK register
* @clkreg_8bit_bus_enable: enable value for 8 bit bus
* @clkreg_neg_edge_enable: enable value for inverted data/cmd output
+ * @cmdreg_cpsm_enable: enable value for CPSM
+ * @cmdreg_lrsp_crc: enable value for long response with crc
+ * @cmdreg_srsp_crc: enable value for short response with crc
+ * @cmdreg_srsp: enable value for short response without crc
* @datalength_bits: number of bits in the MMCIDATALENGTH register
* @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY
* is asserted (likewise for RX)
@@ -282,6 +286,10 @@ struct variant_data {
unsigned int clkreg_enable;
unsigned int clkreg_8bit_bus_enable;
unsigned int clkreg_neg_edge_enable;
+ unsigned int cmdreg_cpsm_enable;
+ unsigned int cmdreg_lrsp_crc;
+ unsigned int cmdreg_srsp_crc;
+ unsigned int cmdreg_srsp;
unsigned int datalength_bits;
unsigned int fifosize;
unsigned int fifohalfsize;
--
2.7.4
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