mmc: octeontx_hsmmc: Add support for MIPS Octeon

Until now, the Octeontx MMC driver did only support the ARM Octeon
TX/Tx2 platforms. This patch adds support for the MIPS Octeon platform
to this driver. Here a short summary of the changes:

- Enable driver compilation for MIPS Octeon, including the MMC related
  header file
- Reorder header inclusion
- Switch to using the clk framework to get the input clock
- Remove some functions for MIPS Octeon, as some registers don't
  exist here

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Aaron Williams <awilliams@marvell.com>
Cc: Chandrakala Chavva <cchavva@marvell.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

1 files changed, 614 insertions, 0 deletions

diff --git a/arch/mips/mach-octeon/include/mach/cvmx-mio-emm-defs.h b/arch/mips/mach-octeon/include/mach/cvmx-mio-emm-defs.h
new file mode 100644
index 0000000000..3572a5965e
--- /dev/null
+++ b/arch/mips/mach-octeon/include/mach/cvmx-mio-emm-defs.h
@@ -0,0 +1,614 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Marvell International Ltd.
+ */
+
+#ifndef __CVMX_MIO_EMM_DEFS_H__
+#define __CVMX_MIO_EMM_DEFS_H__
+
+static inline u64 MIO_EMM_DMA_FIFO_CFG(void)
+{
+	return 0x160;
+}
+
+static inline u64 MIO_EMM_DMA_FIFO_ADR(void)
+{
+	return 0x170;
+}
+
+static inline u64 MIO_EMM_DMA_FIFO_CMD(void)
+{
+	return 0x178;
+}
+
+static inline u64 MIO_EMM_DMA_CFG(void)
+{
+	return 0x180;
+}
+
+static inline u64 MIO_EMM_DMA_ADR(void)
+{
+	return 0x188;
+}
+
+static inline u64 MIO_EMM_DMA_INT(void)
+{
+	return 0x190;
+}
+
+static inline u64 MIO_EMM_CFG(void)
+{
+	return 0x2000;
+}
+
+static inline u64 MIO_EMM_MODEX(u64 a)
+{
+	return 0x2008 + 8 * a;
+}
+
+static inline u64 MIO_EMM_SWITCH(void)
+{
+	return 0x2048;
+}
+
+static inline u64 MIO_EMM_DMA(void)
+{
+	return 0x2050;
+}
+
+static inline u64 MIO_EMM_CMD(void)
+{
+	return 0x2058;
+}
+
+static inline u64 MIO_EMM_RSP_STS(void)
+{
+	return 0x2060;
+}
+
+static inline u64 MIO_EMM_RSP_LO(void)
+{
+	return 0x2068;
+}
+
+static inline u64 MIO_EMM_RSP_HI(void)
+{
+	return 0x2070;
+}
+
+static inline u64 MIO_EMM_INT(void)
+{
+	return 0x2078;
+}
+
+static inline u64 MIO_EMM_WDOG(void)
+{
+	return 0x2088;
+}
+
+static inline u64 MIO_EMM_SAMPLE(void)
+{
+	return 0x2090;
+}
+
+static inline u64 MIO_EMM_STS_MASK(void)
+{
+	return 0x2098;
+}
+
+static inline u64 MIO_EMM_RCA(void)
+{
+	return 0x20a0;
+}
+
+static inline u64 MIO_EMM_BUF_IDX(void)
+{
+	return 0x20e0;
+}
+
+static inline u64 MIO_EMM_BUF_DAT(void)
+{
+	return 0x20e8;
+}
+
+/* Dummy implementation, not documented on MIPS Octeon */
+static inline u64 MIO_EMM_DEBUG(void)
+{
+	return 0x20f8;
+}
+
+/**
+ * mio_emm_access_wdog
+ */
+union mio_emm_access_wdog {
+	u64 u;
+	struct mio_emm_access_wdog_s {
+		uint64_t reserved_32_63 : 32;
+		uint64_t clk_cnt : 32;
+	} s;
+};
+
+/**
+ * mio_emm_buf_dat
+ *
+ * MIO_EMM_BUF_DAT = MIO EMMC Data buffer access Register
+ *
+ */
+union mio_emm_buf_dat {
+	u64 u;
+	struct mio_emm_buf_dat_s {
+		uint64_t dat : 64;
+	} s;
+};
+
+/**
+ * mio_emm_buf_idx
+ *
+ * MIO_EMM_BUF_IDX = MIO EMMC Data buffer address Register
+ *
+ */
+union mio_emm_buf_idx {
+	u64 u;
+	struct mio_emm_buf_idx_s {
+		uint64_t reserved_17_63 : 47;
+		uint64_t inc : 1;
+		uint64_t reserved_7_15 : 9;
+		uint64_t buf_num : 1;
+		uint64_t offset : 6;
+	} s;
+};
+
+/**
+ * mio_emm_cfg
+ *
+ * MIO_EMM_CFG = MIO EMMC Configuration Register
+ *
+ */
+union mio_emm_cfg {
+	u64 u;
+	struct mio_emm_cfg_s {
+		uint64_t reserved_17_63 : 47;
+		uint64_t boot_fail : 1;
+		uint64_t reserved_4_15 : 12;
+		uint64_t bus_ena : 4;
+	} s;
+};
+
+/**
+ * mio_emm_cmd
+ *
+ * MIO_EMM_CMD = MIO EMMC Command Register
+ *
+ */
+union mio_emm_cmd {
+	u64 u;
+	struct mio_emm_cmd_s {
+		uint64_t reserved_63_63 : 1;
+		uint64_t skip_busy : 1;
+		uint64_t bus_id : 2;
+		uint64_t cmd_val : 1;
+		uint64_t reserved_56_58 : 3;
+		uint64_t dbuf : 1;
+		uint64_t offset : 6;
+		uint64_t reserved_43_48 : 6;
+		uint64_t ctype_xor : 2;
+		uint64_t rtype_xor : 3;
+		uint64_t cmd_idx : 6;
+		uint64_t arg : 32;
+	} s;
+};
+
+/**
+ * mio_emm_dma
+ *
+ * MIO_EMM_DMA = MIO EMMC DMA config Register
+ *
+ */
+union mio_emm_dma {
+	u64 u;
+	struct mio_emm_dma_s {
+		uint64_t reserved_63_63 : 1;
+		uint64_t skip_busy : 1;
+		uint64_t bus_id : 2;
+		uint64_t dma_val : 1;
+		uint64_t sector : 1;
+		uint64_t dat_null : 1;
+		uint64_t thres : 6;
+		uint64_t rel_wr : 1;
+		uint64_t rw : 1;
+		uint64_t multi : 1;
+		uint64_t block_cnt : 16;
+		uint64_t card_addr : 32;
+	} s;
+};
+
+/**
+ * mio_emm_dma_adr
+ *
+ * This register sets the address for eMMC/SD flash transfers to/from memory. Sixty-four-bit
+ * operations must be used to access this register. This register is updated by the DMA
+ * hardware and can be reloaded by the values placed in the MIO_EMM_DMA_FIFO_ADR.
+ */
+union mio_emm_dma_adr {
+	u64 u;
+	struct mio_emm_dma_adr_s {
+		uint64_t reserved_42_63 : 22;
+		uint64_t adr : 42;
+	} s;
+};
+
+/**
+ * mio_emm_dma_cfg
+ *
+ * This register controls the internal DMA engine used with the eMMC/SD flash controller. Sixty-
+ * four-bit operations must be used to access this register. This register is updated by the
+ * hardware DMA engine and can also be reloaded by writes to the MIO_EMM_DMA_FIFO_CMD register.
+ */
+union mio_emm_dma_cfg {
+	u64 u;
+	struct mio_emm_dma_cfg_s {
+		uint64_t en : 1;
+		uint64_t rw : 1;
+		uint64_t clr : 1;
+		uint64_t reserved_60_60 : 1;
+		uint64_t swap32 : 1;
+		uint64_t swap16 : 1;
+		uint64_t swap8 : 1;
+		uint64_t endian : 1;
+		uint64_t size : 20;
+		uint64_t reserved_0_35 : 36;
+	} s;
+};
+
+/**
+ * mio_emm_dma_fifo_adr
+ *
+ * This register specifies the internal address that is loaded into the eMMC internal DMA FIFO.
+ * The FIFO is used to queue up operations for the MIO_EMM_DMA_CFG/MIO_EMM_DMA_ADR when the DMA
+ * completes successfully.
+ */
+union mio_emm_dma_fifo_adr {
+	u64 u;
+	struct mio_emm_dma_fifo_adr_s {
+		uint64_t reserved_42_63 : 22;
+		uint64_t adr : 39;
+		uint64_t reserved_0_2 : 3;
+	} s;
+};
+
+/**
+ * mio_emm_dma_fifo_cfg
+ *
+ * This register controls DMA FIFO operations.
+ *
+ */
+union mio_emm_dma_fifo_cfg {
+	u64 u;
+	struct mio_emm_dma_fifo_cfg_s {
+		uint64_t reserved_17_63 : 47;
+		uint64_t clr : 1;
+		uint64_t reserved_13_15 : 3;
+		uint64_t int_lvl : 5;
+		uint64_t reserved_5_7 : 3;
+		uint64_t count : 5;
+	} s;
+};
+
+/**
+ * mio_emm_dma_fifo_cmd
+ *
+ * This register specifies a command that is loaded into the eMMC internal DMA FIFO.  The FIFO is
+ * used to queue up operations for the MIO_EMM_DMA_CFG/MIO_EMM_DMA_ADR when the DMA completes
+ * successfully. Writes to this register store both the MIO_EMM_DMA_FIFO_CMD and the
+ * MIO_EMM_DMA_FIFO_ADR contents into the FIFO and increment the MIO_EMM_DMA_FIFO_CFG[COUNT]
+ * field.
+ *
+ * Note: This register has a similar format to MIO_EMM_DMA_CFG with the exception
+ * that the EN and CLR fields are absent. These are supported in MIO_EMM_DMA_FIFO_CFG.
+ */
+union mio_emm_dma_fifo_cmd {
+	u64 u;
+	struct mio_emm_dma_fifo_cmd_s {
+		uint64_t reserved_63_63 : 1;
+		uint64_t rw : 1;
+		uint64_t reserved_61_61 : 1;
+		uint64_t intdis : 1;
+		uint64_t swap32 : 1;
+		uint64_t swap16 : 1;
+		uint64_t swap8 : 1;
+		uint64_t endian : 1;
+		uint64_t size : 20;
+		uint64_t reserved_0_35 : 36;
+	} s;
+};
+
+/**
+ * mio_emm_dma_int
+ *
+ * Sixty-four-bit operations must be used to access this register.
+ *
+ */
+union mio_emm_dma_int {
+	u64 u;
+	struct mio_emm_dma_int_s {
+		uint64_t reserved_2_63 : 62;
+		uint64_t fifo : 1;
+		uint64_t done : 1;
+	} s;
+};
+
+/**
+ * mio_emm_dma_int_w1s
+ */
+union mio_emm_dma_int_w1s {
+	u64 u;
+	struct mio_emm_dma_int_w1s_s {
+		uint64_t reserved_2_63 : 62;
+		uint64_t fifo : 1;
+		uint64_t done : 1;
+	} s;
+};
+
+/**
+ * mio_emm_int
+ *
+ * MIO_EMM_INT = MIO EMMC Interrupt Register
+ *
+ */
+union mio_emm_int {
+	u64 u;
+	struct mio_emm_int_s {
+		uint64_t reserved_7_63 : 57;
+		uint64_t switch_err : 1;
+		uint64_t switch_done : 1;
+		uint64_t dma_err : 1;
+		uint64_t cmd_err : 1;
+		uint64_t dma_done : 1;
+		uint64_t cmd_done : 1;
+		uint64_t buf_done : 1;
+	} s;
+};
+
+/**
+ * mio_emm_int_en
+ *
+ * MIO_EMM_INT_EN = MIO EMMC Interrupt enable Register
+ *
+ */
+union mio_emm_int_en {
+	u64 u;
+	struct mio_emm_int_en_s {
+		uint64_t reserved_7_63 : 57;
+		uint64_t switch_err : 1;
+		uint64_t switch_done : 1;
+		uint64_t dma_err : 1;
+		uint64_t cmd_err : 1;
+		uint64_t dma_done : 1;
+		uint64_t cmd_done : 1;
+		uint64_t buf_done : 1;
+	} s;
+};
+
+/**
+ * mio_emm_int_w1s
+ */
+union mio_emm_int_w1s {
+	u64 u;
+	struct mio_emm_int_w1s_s {
+		uint64_t reserved_7_63 : 57;
+		uint64_t switch_err : 1;
+		uint64_t switch_done : 1;
+		uint64_t dma_err : 1;
+		uint64_t cmd_err : 1;
+		uint64_t dma_done : 1;
+		uint64_t cmd_done : 1;
+		uint64_t buf_done : 1;
+	} s;
+};
+
+/**
+ * mio_emm_mode#
+ *
+ * MIO_EMM_MODE = MIO EMMC Operating mode Register
+ *
+ */
+union mio_emm_modex {
+	u64 u;
+	struct mio_emm_modex_s {
+		uint64_t reserved_49_63 : 15;
+		uint64_t hs_timing : 1;
+		uint64_t reserved_43_47 : 5;
+		uint64_t bus_width : 3;
+		uint64_t reserved_36_39 : 4;
+		uint64_t power_class : 4;
+		uint64_t clk_hi : 16;
+		uint64_t clk_lo : 16;
+	} s;
+};
+
+/**
+ * mio_emm_rca
+ */
+union mio_emm_rca {
+	u64 u;
+	struct mio_emm_rca_s {
+		uint64_t reserved_16_63 : 48;
+		uint64_t card_rca : 16;
+	} s;
+};
+
+/**
+ * mio_emm_rsp_hi
+ *
+ * MIO_EMM_RSP_HI = MIO EMMC Response data high Register
+ *
+ */
+union mio_emm_rsp_hi {
+	u64 u;
+	struct mio_emm_rsp_hi_s {
+		uint64_t dat : 64;
+	} s;
+};
+
+/**
+ * mio_emm_rsp_lo
+ *
+ * MIO_EMM_RSP_LO = MIO EMMC Response data low Register
+ *
+ */
+union mio_emm_rsp_lo {
+	u64 u;
+	struct mio_emm_rsp_lo_s {
+		uint64_t dat : 64;
+	} s;
+};
+
+/**
+ * mio_emm_rsp_sts
+ *
+ * MIO_EMM_RSP_STS = MIO EMMC Response status Register
+ *
+ */
+union mio_emm_rsp_sts {
+	u64 u;
+	struct mio_emm_rsp_sts_s {
+		uint64_t reserved_62_63 : 2;
+		uint64_t bus_id : 2;
+		uint64_t cmd_val : 1;
+		uint64_t switch_val : 1;
+		uint64_t dma_val : 1;
+		uint64_t dma_pend : 1;
+		uint64_t acc_timeout : 1;
+		uint64_t reserved_29_54 : 26;
+		uint64_t dbuf_err : 1;
+		uint64_t reserved_24_27 : 4;
+		uint64_t dbuf : 1;
+		uint64_t blk_timeout : 1;
+		uint64_t blk_crc_err : 1;
+		uint64_t rsp_busybit : 1;
+		uint64_t stp_timeout : 1;
+		uint64_t stp_crc_err : 1;
+		uint64_t stp_bad_sts : 1;
+		uint64_t stp_val : 1;
+		uint64_t rsp_timeout : 1;
+		uint64_t rsp_crc_err : 1;
+		uint64_t rsp_bad_sts : 1;
+		uint64_t rsp_val : 1;
+		uint64_t rsp_type : 3;
+		uint64_t cmd_type : 2;
+		uint64_t cmd_idx : 6;
+		uint64_t cmd_done : 1;
+	} s;
+};
+
+/**
+ * mio_emm_sample
+ */
+union mio_emm_sample {
+	u64 u;
+	struct mio_emm_sample_s {
+		uint64_t reserved_26_63 : 38;
+		uint64_t cmd_cnt : 10;
+		uint64_t reserved_10_15 : 6;
+		uint64_t dat_cnt : 10;
+	} s;
+};
+
+/**
+ * mio_emm_sts_mask
+ */
+union mio_emm_sts_mask {
+	u64 u;
+	struct mio_emm_sts_mask_s {
+		uint64_t reserved_32_63 : 32;
+		uint64_t sts_msk : 32;
+	} s;
+};
+
+/**
+ * mio_emm_switch
+ *
+ * MIO_EMM_SWITCH = MIO EMMC Operating mode switch Register
+ *
+ */
+union mio_emm_switch {
+	u64 u;
+	struct mio_emm_switch_s {
+		uint64_t reserved_62_63 : 2;
+		uint64_t bus_id : 2;
+		uint64_t switch_exe : 1;
+		uint64_t switch_err0 : 1;
+		uint64_t switch_err1 : 1;
+		uint64_t switch_err2 : 1;
+		uint64_t reserved_49_55 : 7;
+		uint64_t hs_timing : 1;
+		uint64_t reserved_43_47 : 5;
+		uint64_t bus_width : 3;
+		uint64_t reserved_36_39 : 4;
+		uint64_t power_class : 4;
+		uint64_t clk_hi : 16;
+		uint64_t clk_lo : 16;
+	} s;
+};
+
+/**
+ * mio_emm_wdog
+ *
+ * MIO_EMM_WDOG = MIO EMMC Watchdog Register
+ *
+ */
+union mio_emm_wdog {
+	u64 u;
+	struct mio_emm_wdog_s {
+		uint64_t reserved_26_63 : 38;
+		uint64_t clk_cnt : 26;
+	} s;
+};
+
+/*
+ * The following structs are only available to enable compilation of the common
+ * MMC driver. These registers do not exist on MIPS Octeon.
+ */
+
+/**
+ * Register (RSL) mio_emm_timing
+ *
+ * eMMC Timing Register This register determines the number of tap delays
+ * the EMM_DAT, EMM_DS, and EMM_CMD lines are transmitted or received in
+ * relation to EMM_CLK. These values should only be changed when the eMMC
+ * bus is idle.
+ */
+union mio_emm_timing {
+	u64 u;
+	struct mio_emm_timing_s {
+		u64 data_out_tap                     : 6;
+		u64 reserved_6_15                    : 10;
+		u64 data_in_tap                      : 6;
+		u64 reserved_22_31                   : 10;
+		u64 cmd_out_tap                      : 6;
+		u64 reserved_38_47                   : 10;
+		u64 cmd_in_tap                       : 6;
+		u64 reserved_54_63                   : 10;
+	} s;
+};
+
+/**
+ * Register (RSL) mio_emm_debug
+ *
+ * eMMC Debug Register
+ */
+union mio_emm_debug {
+	u64 u;
+	struct mio_emm_debug_s {
+		u64 clk_on                           : 1;
+		u64 reserved_1_7                     : 7;
+		u64 cmd_sm                           : 4;
+		u64 data_sm                          : 4;
+		u64 dma_sm                           : 4;
+		u64 emmc_clk_disable                 : 1;
+		u64 rdsync_rst                       : 1;
+		u64 reserved_22_63                   : 42;
+	} s;
+};
+
+#endif