--- /dev/null
+diff --git a/Documentation/devicetree/bindings/mmc/octeon-mmc.txt b/Documentation/devicetree/bindings/mmc/octeon-mmc.txt
+new file mode 100644
+index 0000000..40dd7f1
+--- /dev/null
++++ b/Documentation/devicetree/bindings/mmc/octeon-mmc.txt
+@@ -0,0 +1,69 @@
++* OCTEON SD/MMC Host Controller
++
++This controller is present on some members of the Cavium OCTEON SoC
++family, provide an interface for eMMC, MMC and SD devices. There is a
++single controller that may have several "slots" connected. These
++slots appear as children of the main controller node.
++The DMA engine is an integral part of the controller block.
++
++Required properties:
++- compatible : Should be "cavium,octeon-6130-mmc" or "cavium,octeon-7890-mmc"
++- reg : Two entries:
++ 1) The base address of the MMC controller register bank.
++ 2) The base address of the MMC DMA engine register bank.
++- interrupts :
++ For "cavium,octeon-6130-mmc": two entries:
++ 1) The MMC controller interrupt line.
++ 2) The MMC DMA engine interrupt line.
++ For "cavium,octeon-7890-mmc": nine entries:
++ 1) The next block transfer of a multiblock transfer has completed (BUF_DONE)
++ 2) Operation completed successfully (CMD_DONE).
++ 3) DMA transfer completed successfully (DMA_DONE).
++ 4) Operation encountered an error (CMD_ERR).
++ 5) DMA transfer encountered an error (DMA_ERR).
++ 6) Switch operation completed successfully (SWITCH_DONE).
++ 7) Switch operation encountered an error (SWITCH_ERR).
++ 8) Internal DMA engine request completion interrupt (DONE).
++ 9) Internal DMA FIFO underflow (FIFO).
++- #address-cells : Must be <1>
++- #size-cells : Must be <0>
++
++Required properties of child nodes:
++- compatible : Should be "cavium,octeon-6130-mmc-slot".
++- reg : The slot number.
++
++Optional properties of child nodes:
++- cd-gpios : Specify GPIOs for card detection
++- wp-gpios : Specify GPIOs for write protection
++- power-gpios : Specify GPIOs for power control
++- cavium,bus-max-width : The number of data lines present in the slot.
++ Default is 8.
++- spi-max-frequency : The maximum operating frequency of the slot.
++ Default is 52000000.
++- cavium,cmd-clk-skew : the amount of delay (in pS) past the clock edge
++ to sample the command pin.
++- cavium,dat-clk-skew : the amount of delay (in pS) past the clock edge
++ to sample the data pin.
++
++Example:
++ mmc@1180000002000 {
++ compatible = "cavium,octeon-6130-mmc";
++ reg = <0x11800 0x00002000 0x0 0x100>,
++ <0x11800 0x00000168 0x0 0x20>;
++ #address-cells = <1>;
++ #size-cells = <0>;
++ /* EMM irq, DMA irq */
++ interrupts = <1 19>, <0 63>;
++
++ /* The board only has a single MMC slot */
++ mmc-slot@0 {
++ compatible = "cavium,octeon-6130-mmc-slot";
++ reg = <0>;
++ spi-max-frequency = <20000000>;
++ /* bus width can be 1, 4 or 8 */
++ cavium,bus-max-width = <8>;
++ cd-gpios = <&gpio 9 0>;
++ wp-gpios = <&gpio 10 0>;
++ power-gpios = <&gpio 8 0>;
++ };
++ };
+diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
+index 2d6fbdd..5077dfa 100644
+--- a/drivers/mmc/host/Kconfig
++++ b/drivers/mmc/host/Kconfig
+@@ -338,6 +338,16 @@
+
+ If unsure, say N.
+
++config MMC_OCTEON
++ tristate "Cavium OCTEON Multimedia Card Interface support"
++ depends on CAVIUM_OCTEON_SOC
++ help
++ This selects Cavium OCTEON Multimedia card Interface.
++ If you have an OCTEON board with a Multimedia Card slot,
++ say Y or M here.
++
++ If unsure, say N.
++
+ config MMC_TIFM_SD
+ tristate "TI Flash Media MMC/SD Interface support"
+ depends on PCI
+diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
+index f7b0a77..448bbc9 100644
+--- a/drivers/mmc/host/Makefile
++++ b/drivers/mmc/host/Makefile
+@@ -19,6 +19,7 @@ obj-$(CONFIG_MMC_SDHCI_SIRF) += sdhci-sirf.o
+ obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o
+ obj-$(CONFIG_MMC_WBSD) += wbsd.o
+ obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
++obj-$(CONFIG_MMC_OCTEON) += octeon_mmc.o
+ obj-$(CONFIG_MMC_OMAP) += omap.o
+ obj-$(CONFIG_MMC_OMAP_HS) += omap_hsmmc.o
+ obj-$(CONFIG_MMC_ATMELMCI) += atmel-mci.o
+diff --git a/drivers/mmc/host/octeon_mmc.c b/drivers/mmc/host/octeon_mmc.c
+new file mode 100644
+index 0000000..baba5a0
+--- /dev/null
++++ b/drivers/mmc/host/octeon_mmc.c
+@@ -0,0 +1,1518 @@
++/*
++ * Driver for MMC and SSD cards for Cavium OCTEON SOCs.
++ *
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2012-2014 Cavium Inc.
++ */
++
++#include <linux/platform_device.h>
++#include <linux/of_platform.h>
++#include <linux/scatterlist.h>
++#include <linux/interrupt.h>
++#include <linux/of_gpio.h>
++#include <linux/blkdev.h>
++#include <linux/device.h>
++#include <linux/module.h>
++#include <linux/delay.h>
++#include <linux/init.h>
++#include <linux/clk.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/of.h>
++
++#include <linux/mmc/card.h>
++#include <linux/mmc/host.h>
++#include <linux/mmc/mmc.h>
++#include <linux/mmc/sd.h>
++#include <net/irda/parameters.h>
++
++#include <asm/byteorder.h>
++#include <asm/octeon/octeon.h>
++#include <asm/octeon/cvmx-mio-defs.h>
++
++#define DRV_NAME "octeon_mmc"
++
++#define OCTEON_MAX_MMC 4
++
++#define OCT_MIO_NDF_DMA_CFG 0x00
++#define OCT_MIO_EMM_DMA_ADR 0x08
++
++#define OCT_MIO_EMM_CFG 0x00
++#define OCT_MIO_EMM_SWITCH 0x48
++#define OCT_MIO_EMM_DMA 0x50
++#define OCT_MIO_EMM_CMD 0x58
++#define OCT_MIO_EMM_RSP_STS 0x60
++#define OCT_MIO_EMM_RSP_LO 0x68
++#define OCT_MIO_EMM_RSP_HI 0x70
++#define OCT_MIO_EMM_INT 0x78
++#define OCT_MIO_EMM_INT_EN 0x80
++#define OCT_MIO_EMM_WDOG 0x88
++#define OCT_MIO_EMM_SAMPLE 0x90
++#define OCT_MIO_EMM_STS_MASK 0x98
++#define OCT_MIO_EMM_RCA 0xa0
++#define OCT_MIO_EMM_BUF_IDX 0xe0
++#define OCT_MIO_EMM_BUF_DAT 0xe8
++
++#define CVMX_MIO_BOOT_CTL CVMX_ADD_IO_SEG(0x00011800000000D0ull)
++
++struct octeon_mmc_host {
++ u64 base;
++ u64 ndf_base;
++ u64 emm_cfg;
++ u64 n_minus_one; /* OCTEON II workaround location */
++ int last_slot;
++
++ struct semaphore mmc_serializer;
++ struct mmc_request *current_req;
++ unsigned int linear_buf_size;
++ void *linear_buf;
++ struct sg_mapping_iter smi;
++ int sg_idx;
++ bool dma_active;
++
++ struct platform_device *pdev;
++ int global_pwr_gpio;
++ bool global_pwr_gpio_low;
++ bool dma_err_pending;
++ bool need_bootbus_lock;
++ bool big_dma_addr;
++ bool need_irq_handler_lock;
++ spinlock_t irq_handler_lock;
++
++ struct octeon_mmc_slot *slot[OCTEON_MAX_MMC];
++};
++
++struct octeon_mmc_slot {
++ struct mmc_host *mmc; /* slot-level mmc_core object */
++ struct octeon_mmc_host *host; /* common hw for all 4 slots */
++
++ unsigned int clock;
++ unsigned int sclock;
++
++ u64 cached_switch;
++ u64 cached_rca;
++
++ unsigned int cmd_cnt; /* sample delay */
++ unsigned int dat_cnt; /* sample delay */
++
++ int bus_width;
++ int bus_id;
++ int ro_gpio;
++ int cd_gpio;
++ int pwr_gpio;
++ bool cd_gpio_low;
++ bool ro_gpio_low;
++ bool pwr_gpio_low;
++};
++
++static int bb_size = 1 << 16;
++module_param(bb_size, int, S_IRUGO);
++MODULE_PARM_DESC(bb_size,
++ "Size of DMA linearizing buffer (max transfer size).");
++
++static int ddr = 2;
++module_param(ddr, int, S_IRUGO);
++MODULE_PARM_DESC(ddr,
++ "enable DoubleDataRate clocking: 0=no, 1=always, 2=at spi-max-frequency/2");
++
++#if 0
++#define octeon_mmc_dbg trace_printk
++#else
++static inline void octeon_mmc_dbg(const char *s, ...) { }
++#endif
++
++static void octeon_mmc_acquire_bus(struct octeon_mmc_host *host)
++{
++ if (host->need_bootbus_lock) {
++ down(&octeon_bootbus_sem);
++ /* On cn70XX switch the mmc unit onto the bus. */
++ if (OCTEON_IS_MODEL(OCTEON_CN70XX))
++ cvmx_write_csr(CVMX_MIO_BOOT_CTL, 0);
++ } else {
++ down(&host->mmc_serializer);
++ }
++}
++
++static void octeon_mmc_release_bus(struct octeon_mmc_host *host)
++{
++ if (host->need_bootbus_lock)
++ up(&octeon_bootbus_sem);
++ else
++ up(&host->mmc_serializer);
++}
++
++struct octeon_mmc_cr_type {
++ u8 ctype;
++ u8 rtype;
++};
++
++/*
++ * The OCTEON MMC host hardware assumes that all commands have fixed
++ * command and response types. These are correct if MMC devices are
++ * being used. However, non-MMC devices like SD use command and
++ * response types that are unexpected by the host hardware.
++ *
++ * The command and response types can be overridden by supplying an
++ * XOR value that is applied to the type. We calculate the XOR value
++ * from the values in this table and the flags passed from the MMC
++ * core.
++ */
++static struct octeon_mmc_cr_type octeon_mmc_cr_types[] = {
++ {0, 0}, /* CMD0 */
++ {0, 3}, /* CMD1 */
++ {0, 2}, /* CMD2 */
++ {0, 1}, /* CMD3 */
++ {0, 0}, /* CMD4 */
++ {0, 1}, /* CMD5 */
++ {0, 1}, /* CMD6 */
++ {0, 1}, /* CMD7 */
++ {1, 1}, /* CMD8 */
++ {0, 2}, /* CMD9 */
++ {0, 2}, /* CMD10 */
++ {1, 1}, /* CMD11 */
++ {0, 1}, /* CMD12 */
++ {0, 1}, /* CMD13 */
++ {1, 1}, /* CMD14 */
++ {0, 0}, /* CMD15 */
++ {0, 1}, /* CMD16 */
++ {1, 1}, /* CMD17 */
++ {1, 1}, /* CMD18 */
++ {3, 1}, /* CMD19 */
++ {2, 1}, /* CMD20 */
++ {0, 0}, /* CMD21 */
++ {0, 0}, /* CMD22 */
++ {0, 1}, /* CMD23 */
++ {2, 1}, /* CMD24 */
++ {2, 1}, /* CMD25 */
++ {2, 1}, /* CMD26 */
++ {2, 1}, /* CMD27 */
++ {0, 1}, /* CMD28 */
++ {0, 1}, /* CMD29 */
++ {1, 1}, /* CMD30 */
++ {1, 1}, /* CMD31 */
++ {0, 0}, /* CMD32 */
++ {0, 0}, /* CMD33 */
++ {0, 0}, /* CMD34 */
++ {0, 1}, /* CMD35 */
++ {0, 1}, /* CMD36 */
++ {0, 0}, /* CMD37 */
++ {0, 1}, /* CMD38 */
++ {0, 4}, /* CMD39 */
++ {0, 5}, /* CMD40 */
++ {0, 0}, /* CMD41 */
++ {2, 1}, /* CMD42 */
++ {0, 0}, /* CMD43 */
++ {0, 0}, /* CMD44 */
++ {0, 0}, /* CMD45 */
++ {0, 0}, /* CMD46 */
++ {0, 0}, /* CMD47 */
++ {0, 0}, /* CMD48 */
++ {0, 0}, /* CMD49 */
++ {0, 0}, /* CMD50 */
++ {0, 0}, /* CMD51 */
++ {0, 0}, /* CMD52 */
++ {0, 0}, /* CMD53 */
++ {0, 0}, /* CMD54 */
++ {0, 1}, /* CMD55 */
++ {0xff, 0xff}, /* CMD56 */
++ {0, 0}, /* CMD57 */
++ {0, 0}, /* CMD58 */
++ {0, 0}, /* CMD59 */
++ {0, 0}, /* CMD60 */
++ {0, 0}, /* CMD61 */
++ {0, 0}, /* CMD62 */
++ {0, 0} /* CMD63 */
++};
++
++struct octeon_mmc_cr_mods {
++ u8 ctype_xor;
++ u8 rtype_xor;
++};
++
++/*
++ * The functions below are used for the EMMC-17978 workaround.
++ *
++ * Due to an imperfection in the design of the MMC bus hardware,
++ * the 2nd to last cache block of a DMA read must be locked into the L2 Cache.
++ * Otherwise, data corruption may occur.
++ */
++
++static inline void *phys_to_ptr(u64 address)
++{
++ return (void *)(address | (1ull<<63)); /* XKPHYS */
++}
++
++/**
++ * Lock a single line into L2. The line is zeroed before locking
++ * to make sure no dram accesses are made.
++ *
++ * @addr Physical address to lock
++ */
++static void l2c_lock_line(u64 addr)
++{
++ char *addr_ptr = phys_to_ptr(addr);
++
++ asm volatile (
++ "cache 31, %[line]" /* Unlock the line */
++ :: [line] "m" (*addr_ptr));
++}
++
++/**
++ * Locks a memory region in the L2 cache
++ *
++ * @start - start address to begin locking
++ * @len - length in bytes to lock
++ */
++static void l2c_lock_mem_region(u64 start, u64 len)
++{
++ u64 end;
++
++ /* Round start/end to cache line boundaries */
++ end = ALIGN(start + len - 1, CVMX_CACHE_LINE_SIZE);
++ start = ALIGN(start, CVMX_CACHE_LINE_SIZE);
++
++ while (start <= end) {
++ l2c_lock_line(start);
++ start += CVMX_CACHE_LINE_SIZE;
++ }
++ asm volatile("sync");
++}
++
++/**
++ * Unlock a single line in the L2 cache.
++ *
++ * @addr Physical address to unlock
++ *
++ * Return Zero on success
++ */
++static void l2c_unlock_line(u64 addr)
++{
++ char *addr_ptr = phys_to_ptr(addr);
++ asm volatile (
++ "cache 23, %[line]" /* Unlock the line */
++ :: [line] "m" (*addr_ptr));
++}
++
++/**
++ * Unlock a memory region in the L2 cache
++ *
++ * @start - start address to unlock
++ * @len - length to unlock in bytes
++ */
++static void l2c_unlock_mem_region(u64 start, u64 len)
++{
++ u64 end;
++
++ /* Round start/end to cache line boundaries */
++ end = ALIGN(start + len - 1, CVMX_CACHE_LINE_SIZE);
++ start = ALIGN(start, CVMX_CACHE_LINE_SIZE);
++
++ while (start <= end) {
++ l2c_unlock_line(start);
++ start += CVMX_CACHE_LINE_SIZE;
++ }
++}
++
++static struct octeon_mmc_cr_mods octeon_mmc_get_cr_mods(struct mmc_command *cmd)
++{
++ struct octeon_mmc_cr_type *cr;
++ u8 desired_ctype, hardware_ctype;
++ u8 desired_rtype, hardware_rtype;
++ struct octeon_mmc_cr_mods r;
++
++ desired_ctype = desired_rtype = 0;
++
++ cr = octeon_mmc_cr_types + (cmd->opcode & 0x3f);
++ hardware_ctype = cr->ctype;
++ hardware_rtype = cr->rtype;
++ if (cmd->opcode == 56) { /* CMD56 GEN_CMD */
++ hardware_ctype = (cmd->arg & 1) ? 1 : 2;
++ }
++
++ switch (mmc_cmd_type(cmd)) {
++ case MMC_CMD_ADTC:
++ desired_ctype = (cmd->data->flags & MMC_DATA_WRITE) ? 2 : 1;
++ break;
++ case MMC_CMD_AC:
++ case MMC_CMD_BC:
++ case MMC_CMD_BCR:
++ desired_ctype = 0;
++ break;
++ }
++
++ switch (mmc_resp_type(cmd)) {
++ case MMC_RSP_NONE:
++ desired_rtype = 0;
++ break;
++ case MMC_RSP_R1:/* MMC_RSP_R5, MMC_RSP_R6, MMC_RSP_R7 */
++ case MMC_RSP_R1B:
++ desired_rtype = 1;
++ break;
++ case MMC_RSP_R2:
++ desired_rtype = 2;
++ break;
++ case MMC_RSP_R3: /* MMC_RSP_R4 */
++ desired_rtype = 3;
++ break;
++ }
++ r.ctype_xor = desired_ctype ^ hardware_ctype;
++ r.rtype_xor = desired_rtype ^ hardware_rtype;
++ return r;
++}
++
++static bool octeon_mmc_switch_val_changed(struct octeon_mmc_slot *slot,
++ u64 new_val)
++{
++ /* Match BUS_ID, HS_TIMING, BUS_WIDTH, POWER_CLASS, CLK_HI, CLK_LO */
++ u64 m = 0x3001070fffffffffull;
++
++ return (slot->cached_switch & m) != (new_val & m);
++}
++
++static unsigned int octeon_mmc_timeout_to_wdog(struct octeon_mmc_slot *slot,
++ unsigned int ns)
++{
++ u64 bt = (u64)slot->clock * (u64)ns;
++
++ return (unsigned int)(bt / 1000000000);
++}
++
++static irqreturn_t octeon_mmc_interrupt(int irq, void *dev_id)
++{
++ struct octeon_mmc_host *host = dev_id;
++ union cvmx_mio_emm_int emm_int;
++ struct mmc_request *req;
++ bool host_done;
++ union cvmx_mio_emm_rsp_sts rsp_sts;
++ unsigned long flags = 0;
++
++ if (host->need_irq_handler_lock)
++ spin_lock_irqsave(&host->irq_handler_lock, flags);
++ emm_int.u64 = cvmx_read_csr(host->base + OCT_MIO_EMM_INT);
++ req = host->current_req;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_INT, emm_int.u64);
++
++ octeon_mmc_dbg("Got interrupt: EMM_INT = 0x%llx\n", emm_int.u64);
++
++ if (!req)
++ goto out;
++
++ rsp_sts.u64 = cvmx_read_csr(host->base + OCT_MIO_EMM_RSP_STS);
++ octeon_mmc_dbg("octeon_mmc_interrupt MIO_EMM_RSP_STS 0x%llx\n",
++ rsp_sts.u64);
++
++ if (host->dma_err_pending) {
++ host->current_req = NULL;
++ host->dma_err_pending = false;
++ req->done(req);
++ host_done = true;
++ goto no_req_done;
++ }
++
++ if (!host->dma_active && emm_int.s.buf_done && req->data) {
++ unsigned int type = (rsp_sts.u64 >> 7) & 3;
++
++ if (type == 1) {
++ /* Read */
++ int dbuf = rsp_sts.s.dbuf;
++ struct sg_mapping_iter *smi = &host->smi;
++ unsigned int data_len =
++ req->data->blksz * req->data->blocks;
++ unsigned int bytes_xfered;
++ u64 dat = 0;
++ int shift = -1;
++
++ /* Auto inc from offset zero */
++ cvmx_write_csr(host->base + OCT_MIO_EMM_BUF_IDX,
++ (u64)(0x10000 | (dbuf << 6)));
++
++ for (bytes_xfered = 0; bytes_xfered < data_len;) {
++ if (smi->consumed >= smi->length) {
++ if (!sg_miter_next(smi))
++ break;
++ smi->consumed = 0;
++ }
++ if (shift < 0) {
++ dat = cvmx_read_csr(host->base +
++ OCT_MIO_EMM_BUF_DAT);
++ shift = 56;
++ }
++
++ while (smi->consumed < smi->length &&
++ shift >= 0) {
++ ((u8 *)(smi->addr))[smi->consumed] =
++ (dat >> shift) & 0xff;
++ bytes_xfered++;
++ smi->consumed++;
++ shift -= 8;
++ }
++ }
++ sg_miter_stop(smi);
++ req->data->bytes_xfered = bytes_xfered;
++ req->data->error = 0;
++ } else if (type == 2) {
++ /* write */
++ req->data->bytes_xfered = req->data->blksz *
++ req->data->blocks;
++ req->data->error = 0;
++ }
++ }
++ host_done = emm_int.s.cmd_done || emm_int.s.dma_done ||
++ emm_int.s.cmd_err || emm_int.s.dma_err;
++ if (host_done && req->done) {
++ if (rsp_sts.s.rsp_bad_sts ||
++ rsp_sts.s.rsp_crc_err ||
++ rsp_sts.s.rsp_timeout ||
++ rsp_sts.s.blk_crc_err ||
++ rsp_sts.s.blk_timeout ||
++ rsp_sts.s.dbuf_err) {
++ req->cmd->error = -EILSEQ;
++ } else {
++ req->cmd->error = 0;
++ }
++
++ if (host->dma_active && req->data) {
++ req->data->error = 0;
++ req->data->bytes_xfered = req->data->blocks *
++ req->data->blksz;
++ if (!(req->data->flags & MMC_DATA_WRITE) &&
++ req->data->sg_len > 1) {
++ size_t r = sg_copy_from_buffer(req->data->sg,
++ req->data->sg_len, host->linear_buf,
++ req->data->bytes_xfered);
++ WARN_ON(r != req->data->bytes_xfered);
++ }
++ }
++ if (rsp_sts.s.rsp_val) {
++ u64 rsp_hi;
++ u64 rsp_lo = cvmx_read_csr(
++ host->base + OCT_MIO_EMM_RSP_LO);
++
++ switch (rsp_sts.s.rsp_type) {
++ case 1:
++ case 3:
++ req->cmd->resp[0] = (rsp_lo >> 8) & 0xffffffff;
++ req->cmd->resp[1] = 0;
++ req->cmd->resp[2] = 0;
++ req->cmd->resp[3] = 0;
++ break;
++ case 2:
++ req->cmd->resp[3] = rsp_lo & 0xffffffff;
++ req->cmd->resp[2] = (rsp_lo >> 32) & 0xffffffff;
++ rsp_hi = cvmx_read_csr(host->base +
++ OCT_MIO_EMM_RSP_HI);
++ req->cmd->resp[1] = rsp_hi & 0xffffffff;
++ req->cmd->resp[0] = (rsp_hi >> 32) & 0xffffffff;
++ break;
++ default:
++ octeon_mmc_dbg("octeon_mmc_interrupt unhandled rsp_val %d\n",
++ rsp_sts.s.rsp_type);
++ break;
++ }
++ octeon_mmc_dbg("octeon_mmc_interrupt resp %08x %08x %08x %08x\n",
++ req->cmd->resp[0], req->cmd->resp[1],
++ req->cmd->resp[2], req->cmd->resp[3]);
++ }
++ if (emm_int.s.dma_err && rsp_sts.s.dma_pend) {
++ /* Try to clean up failed DMA */
++ union cvmx_mio_emm_dma emm_dma;
++
++ emm_dma.u64 =
++ cvmx_read_csr(host->base + OCT_MIO_EMM_DMA);
++ emm_dma.s.dma_val = 1;
++ emm_dma.s.dat_null = 1;
++ emm_dma.s.bus_id = rsp_sts.s.bus_id;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_DMA,
++ emm_dma.u64);
++ host->dma_err_pending = true;
++ host_done = false;
++ goto no_req_done;
++ }
++
++ host->current_req = NULL;
++ req->done(req);
++ }
++no_req_done:
++ if (host->n_minus_one) {
++ l2c_unlock_mem_region(host->n_minus_one, 512);
++ host->n_minus_one = 0;
++ }
++ if (host_done)
++ octeon_mmc_release_bus(host);
++out:
++ if (host->need_irq_handler_lock)
++ spin_unlock_irqrestore(&host->irq_handler_lock, flags);
++ return IRQ_RETVAL(emm_int.u64 != 0);
++}
++
++static void octeon_mmc_switch_to(struct octeon_mmc_slot *slot)
++{
++ struct octeon_mmc_host *host = slot->host;
++ struct octeon_mmc_slot *old_slot;
++ union cvmx_mio_emm_switch sw;
++ union cvmx_mio_emm_sample samp;
++
++ if (slot->bus_id == host->last_slot)
++ goto out;
++
++ if (host->last_slot >= 0) {
++ old_slot = host->slot[host->last_slot];
++ old_slot->cached_switch =
++ cvmx_read_csr(host->base + OCT_MIO_EMM_SWITCH);
++ old_slot->cached_rca =
++ cvmx_read_csr(host->base + OCT_MIO_EMM_RCA);
++ }
++ cvmx_write_csr(host->base + OCT_MIO_EMM_RCA, slot->cached_rca);
++ sw.u64 = slot->cached_switch;
++ sw.s.bus_id = 0;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_SWITCH, sw.u64);
++ sw.s.bus_id = slot->bus_id;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_SWITCH, sw.u64);
++
++ samp.u64 = 0;
++ samp.s.cmd_cnt = slot->cmd_cnt;
++ samp.s.dat_cnt = slot->dat_cnt;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_SAMPLE, samp.u64);
++out:
++ host->last_slot = slot->bus_id;
++}
++
++static void octeon_mmc_dma_request(struct mmc_host *mmc,
++ struct mmc_request *mrq)
++{
++ struct octeon_mmc_slot *slot;
++ struct octeon_mmc_host *host;
++ struct mmc_command *cmd;
++ struct mmc_data *data;
++ union cvmx_mio_emm_int emm_int;
++ union cvmx_mio_emm_dma emm_dma;
++ union cvmx_mio_ndf_dma_cfg dma_cfg;
++
++ cmd = mrq->cmd;
++ if (mrq->data == NULL || mrq->data->sg == NULL || !mrq->data->sg_len ||
++ mrq->stop == NULL || mrq->stop->opcode != MMC_STOP_TRANSMISSION) {
++ dev_err(&mmc->card->dev,
++ "Error: octeon_mmc_dma_request no data\n");
++ cmd->error = -EINVAL;
++ if (mrq->done)
++ mrq->done(mrq);
++ return;
++ }
++
++ slot = mmc_priv(mmc);
++ host = slot->host;
++
++ /* Only a single user of the bootbus at a time. */
++ octeon_mmc_acquire_bus(host);
++
++ octeon_mmc_switch_to(slot);
++
++ data = mrq->data;
++
++ if (data->timeout_ns) {
++ cvmx_write_csr(host->base + OCT_MIO_EMM_WDOG,
++ octeon_mmc_timeout_to_wdog(slot, data->timeout_ns));
++ octeon_mmc_dbg("OCT_MIO_EMM_WDOG %llu\n",
++ cvmx_read_csr(host->base + OCT_MIO_EMM_WDOG));
++ }
++
++ WARN_ON(host->current_req);
++ host->current_req = mrq;
++
++ host->sg_idx = 0;
++
++ WARN_ON(data->blksz * data->blocks > host->linear_buf_size);
++
++ if ((data->flags & MMC_DATA_WRITE) && data->sg_len > 1) {
++ size_t r = sg_copy_to_buffer(data->sg, data->sg_len,
++ host->linear_buf, data->blksz * data->blocks);
++ WARN_ON(data->blksz * data->blocks != r);
++ }
++
++ dma_cfg.u64 = 0;
++ dma_cfg.s.en = 1;
++ dma_cfg.s.rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0;
++#ifdef __LITTLE_ENDIAN
++ dma_cfg.s.endian = 1;
++#endif
++ dma_cfg.s.size = ((data->blksz * data->blocks) / 8) - 1;
++ if (!host->big_dma_addr) {
++ if (data->sg_len > 1)
++ dma_cfg.s.adr = virt_to_phys(host->linear_buf);
++ else
++ dma_cfg.s.adr = sg_phys(data->sg);
++ }
++ cvmx_write_csr(host->ndf_base + OCT_MIO_NDF_DMA_CFG, dma_cfg.u64);
++ octeon_mmc_dbg("MIO_NDF_DMA_CFG: %016llx\n",
++ (unsigned long long)dma_cfg.u64);
++ if (host->big_dma_addr) {
++ u64 addr;
++
++ if (data->sg_len > 1)
++ addr = virt_to_phys(host->linear_buf);
++ else
++ addr = sg_phys(data->sg);
++ cvmx_write_csr(host->ndf_base + OCT_MIO_EMM_DMA_ADR, addr);
++ octeon_mmc_dbg("MIO_EMM_DMA_ADR: %016llx\n",
++ (unsigned long long)addr);
++ }
++
++ emm_dma.u64 = 0;
++ emm_dma.s.bus_id = slot->bus_id;
++ emm_dma.s.dma_val = 1;
++ emm_dma.s.sector = mmc_card_blockaddr(mmc->card) ? 1 : 0;
++ emm_dma.s.rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0;
++ if (mmc_card_mmc(mmc->card) ||
++ (mmc_card_sd(mmc->card) &&
++ (mmc->card->scr.cmds & SD_SCR_CMD23_SUPPORT)))
++ emm_dma.s.multi = 1;
++ emm_dma.s.block_cnt = data->blocks;
++ emm_dma.s.card_addr = cmd->arg;
++
++ emm_int.u64 = 0;
++ emm_int.s.dma_done = 1;
++ emm_int.s.cmd_err = 1;
++ emm_int.s.dma_err = 1;
++ /* Clear the bit. */
++ cvmx_write_csr(host->base + OCT_MIO_EMM_INT, emm_int.u64);
++ cvmx_write_csr(host->base + OCT_MIO_EMM_INT_EN, emm_int.u64);
++ host->dma_active = true;
++
++ if ((OCTEON_IS_MODEL(OCTEON_CN6XXX) ||
++ OCTEON_IS_MODEL(OCTEON_CNF7XXX)) &&
++ cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK &&
++ (data->blksz * data->blocks) > 1024) {
++ host->n_minus_one = dma_cfg.s.adr +
++ (data->blksz * data->blocks) - 1024;
++ l2c_lock_mem_region(host->n_minus_one, 512);
++ }
++
++ if (mmc->card && mmc_card_sd(mmc->card))
++ cvmx_write_csr(host->base + OCT_MIO_EMM_STS_MASK,
++ 0x00b00000ull);
++ else
++ cvmx_write_csr(host->base + OCT_MIO_EMM_STS_MASK,
++ 0xe4f90080ull);
++ cvmx_write_csr(host->base + OCT_MIO_EMM_DMA, emm_dma.u64);
++ octeon_mmc_dbg("MIO_EMM_DMA: %llx\n", emm_dma.u64);
++}
++
++static void octeon_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
++{
++ struct octeon_mmc_slot *slot;
++ struct octeon_mmc_host *host;
++ struct mmc_command *cmd;
++ union cvmx_mio_emm_int emm_int;
++ union cvmx_mio_emm_cmd emm_cmd;
++ struct octeon_mmc_cr_mods mods;
++
++ cmd = mrq->cmd;
++
++ if (cmd->opcode == MMC_READ_MULTIPLE_BLOCK ||
++ cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK) {
++ octeon_mmc_dma_request(mmc, mrq);
++ return;
++ }
++
++ mods = octeon_mmc_get_cr_mods(cmd);
++
++ slot = mmc_priv(mmc);
++ host = slot->host;
++
++ /* Only a single user of the bootbus at a time. */
++ octeon_mmc_acquire_bus(host);
++
++ octeon_mmc_switch_to(slot);
++
++ WARN_ON(host->current_req);
++ host->current_req = mrq;
++
++ emm_int.u64 = 0;
++ emm_int.s.cmd_done = 1;
++ emm_int.s.cmd_err = 1;
++ if (cmd->data) {
++ octeon_mmc_dbg("command has data\n");
++ if (cmd->data->flags & MMC_DATA_READ) {
++ sg_miter_start(&host->smi, mrq->data->sg,
++ mrq->data->sg_len,
++ SG_MITER_ATOMIC | SG_MITER_TO_SG);
++ } else {
++ struct sg_mapping_iter *smi = &host->smi;
++ unsigned int data_len =
++ mrq->data->blksz * mrq->data->blocks;
++ unsigned int bytes_xfered;
++ u64 dat = 0;
++ int shift = 56;
++ /*
++ * Copy data to the xmit buffer before
++ * issuing the command
++ */
++ sg_miter_start(smi, mrq->data->sg,
++ mrq->data->sg_len, SG_MITER_FROM_SG);
++ /* Auto inc from offset zero, dbuf zero */
++ cvmx_write_csr(host->base + OCT_MIO_EMM_BUF_IDX,
++ 0x10000ull);
++
++ for (bytes_xfered = 0; bytes_xfered < data_len;) {
++ if (smi->consumed >= smi->length) {
++ if (!sg_miter_next(smi))
++ break;
++ smi->consumed = 0;
++ }
++
++ while (smi->consumed < smi->length &&
++ shift >= 0) {
++
++ dat |= (u64)(((u8 *)(smi->addr))
++ [smi->consumed]) << shift;
++ bytes_xfered++;
++ smi->consumed++;
++ shift -= 8;
++ }
++ if (shift < 0) {
++ cvmx_write_csr(host->base +
++ OCT_MIO_EMM_BUF_DAT, dat);
++ shift = 56;
++ dat = 0;
++ }
++ }
++ sg_miter_stop(smi);
++ }
++ if (cmd->data->timeout_ns) {
++ cvmx_write_csr(host->base + OCT_MIO_EMM_WDOG,
++ octeon_mmc_timeout_to_wdog(slot,
++ cmd->data->timeout_ns));
++ octeon_mmc_dbg("OCT_MIO_EMM_WDOG %llu\n",
++ cvmx_read_csr(host->base +
++ OCT_MIO_EMM_WDOG));
++ }
++ } else {
++ cvmx_write_csr(host->base + OCT_MIO_EMM_WDOG,
++ ((u64)slot->clock * 850ull) / 1000ull);
++ octeon_mmc_dbg("OCT_MIO_EMM_WDOG %llu\n",
++ cvmx_read_csr(host->base + OCT_MIO_EMM_WDOG));
++ }
++ /* Clear the bit. */
++ cvmx_write_csr(host->base + OCT_MIO_EMM_INT, emm_int.u64);
++ cvmx_write_csr(host->base + OCT_MIO_EMM_INT_EN, emm_int.u64);
++ host->dma_active = false;
++
++ emm_cmd.u64 = 0;
++ emm_cmd.s.cmd_val = 1;
++ emm_cmd.s.ctype_xor = mods.ctype_xor;
++ emm_cmd.s.rtype_xor = mods.rtype_xor;
++ if (mmc_cmd_type(cmd) == MMC_CMD_ADTC)
++ emm_cmd.s.offset = 64 -
++ ((cmd->data->blksz * cmd->data->blocks) / 8);
++ emm_cmd.s.bus_id = slot->bus_id;
++ emm_cmd.s.cmd_idx = cmd->opcode;
++ emm_cmd.s.arg = cmd->arg;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_STS_MASK, 0);
++ cvmx_write_csr(host->base + OCT_MIO_EMM_CMD, emm_cmd.u64);
++ octeon_mmc_dbg("MIO_EMM_CMD: %llx\n", emm_cmd.u64);
++}
++
++static void octeon_mmc_reset_bus(struct octeon_mmc_slot *slot, int preserve)
++{
++ union cvmx_mio_emm_cfg emm_cfg;
++ union cvmx_mio_emm_switch emm_switch;
++ u64 wdog = 0;
++
++ emm_cfg.u64 = cvmx_read_csr(slot->host->base + OCT_MIO_EMM_CFG);
++ if (preserve) {
++ emm_switch.u64 = cvmx_read_csr(slot->host->base +
++ OCT_MIO_EMM_SWITCH);
++ wdog = cvmx_read_csr(slot->host->base + OCT_MIO_EMM_WDOG);
++ }
++
++ /* Restore switch settings */
++ if (preserve) {
++ emm_switch.s.switch_exe = 0;
++ emm_switch.s.switch_err0 = 0;
++ emm_switch.s.switch_err1 = 0;
++ emm_switch.s.switch_err2 = 0;
++ emm_switch.s.bus_id = 0;
++ cvmx_write_csr(slot->host->base + OCT_MIO_EMM_SWITCH,
++ emm_switch.u64);
++ emm_switch.s.bus_id = slot->bus_id;
++ cvmx_write_csr(slot->host->base + OCT_MIO_EMM_SWITCH,
++ emm_switch.u64);
++
++ slot->cached_switch = emm_switch.u64;
++
++ msleep(10);
++ cvmx_write_csr(slot->host->base + OCT_MIO_EMM_WDOG, wdog);
++ } else {
++ slot->cached_switch = 0;
++ }
++}
++
++static void octeon_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
++{
++ struct octeon_mmc_slot *slot;
++ struct octeon_mmc_host *host;
++ int bus_width;
++ int clock;
++ bool ddr_clock;
++ int hs_timing;
++ int power_class = 10;
++ int clk_period;
++ int timeout = 2000;
++ union cvmx_mio_emm_switch emm_switch;
++ union cvmx_mio_emm_rsp_sts emm_sts;
++
++ slot = mmc_priv(mmc);
++ host = slot->host;
++
++ /* Only a single user of the bootbus at a time. */
++ octeon_mmc_acquire_bus(host);
++
++ octeon_mmc_switch_to(slot);
++
++ octeon_mmc_dbg("Calling set_ios: slot: clk = 0x%x, bus_width = %d\n",
++ slot->clock, slot->bus_width);
++ octeon_mmc_dbg("Calling set_ios: ios: clk = 0x%x, vdd = %u, bus_width = %u, power_mode = %u, timing = %u\n",
++ ios->clock, ios->vdd, ios->bus_width, ios->power_mode,
++ ios->timing);
++ octeon_mmc_dbg("Calling set_ios: mmc: caps = 0x%x, bus_width = %d\n",
++ mmc->caps, mmc->ios.bus_width);
++
++ /*
++ * Reset the chip on each power off
++ */
++ if (ios->power_mode == MMC_POWER_OFF) {
++ octeon_mmc_reset_bus(slot, 1);
++ if (slot->pwr_gpio >= 0)
++ gpio_set_value_cansleep(slot->pwr_gpio,
++ slot->pwr_gpio_low);
++ } else {
++ if (slot->pwr_gpio >= 0)
++ gpio_set_value_cansleep(slot->pwr_gpio,
++ !slot->pwr_gpio_low);
++ }
++
++ switch (ios->bus_width) {
++ case MMC_BUS_WIDTH_8:
++ bus_width = 2;
++ break;
++ case MMC_BUS_WIDTH_4:
++ bus_width = 1;
++ break;
++ case MMC_BUS_WIDTH_1:
++ bus_width = 0;
++ break;
++ default:
++ octeon_mmc_dbg("unknown bus width %d\n", ios->bus_width);
++ bus_width = 0;
++ break;
++ }
++
++ hs_timing = (ios->timing == MMC_TIMING_MMC_HS);
++ ddr_clock = (bus_width && ios->timing >= MMC_TIMING_UHS_DDR50);
++
++ if (ddr_clock)
++ bus_width |= 4;
++
++ if (ios->clock) {
++ slot->clock = ios->clock;
++ slot->bus_width = bus_width;
++
++ clock = slot->clock;
++
++ if (clock > 52000000)
++ clock = 52000000;
++
++ clk_period = (octeon_get_io_clock_rate() + clock - 1) /
++ (2 * clock);
++
++ /* until clock-renengotiate-on-CRC is in */
++ if (ddr_clock && ddr > 1)
++ clk_period *= 2;
++
++ emm_switch.u64 = 0;
++ emm_switch.s.hs_timing = hs_timing;
++ emm_switch.s.bus_width = bus_width;
++ emm_switch.s.power_class = power_class;
++ emm_switch.s.clk_hi = clk_period;
++ emm_switch.s.clk_lo = clk_period;
++
++ if (!octeon_mmc_switch_val_changed(slot, emm_switch.u64)) {
++ octeon_mmc_dbg("No change from 0x%llx mio_emm_switch, returning.\n",
++ emm_switch.u64);
++ goto out;
++ }
++
++ octeon_mmc_dbg("Writing 0x%llx to mio_emm_wdog\n",
++ ((u64)clock * 850ull) / 1000ull);
++ cvmx_write_csr(host->base + OCT_MIO_EMM_WDOG,
++ ((u64)clock * 850ull) / 1000ull);
++ octeon_mmc_dbg("Writing 0x%llx to mio_emm_switch\n",
++ emm_switch.u64);
++
++ cvmx_write_csr(host->base + OCT_MIO_EMM_SWITCH, emm_switch.u64);
++ emm_switch.s.bus_id = slot->bus_id;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_SWITCH, emm_switch.u64);
++ slot->cached_switch = emm_switch.u64;
++
++ do {
++ emm_sts.u64 =
++ cvmx_read_csr(host->base + OCT_MIO_EMM_RSP_STS);
++ if (!emm_sts.s.switch_val)
++ break;
++ udelay(100);
++ } while (timeout-- > 0);
++
++ if (timeout <= 0) {
++ octeon_mmc_dbg("switch command timed out, status=0x%llx\n",
++ emm_sts.u64);
++ goto out;
++ }
++ }
++out:
++ octeon_mmc_release_bus(host);
++}
++
++static int octeon_mmc_get_ro(struct mmc_host *mmc)
++{
++ struct octeon_mmc_slot *slot = mmc_priv(mmc);
++
++ if (slot->ro_gpio >= 0) {
++ int pin = gpio_get_value_cansleep(slot->ro_gpio);
++
++ if (pin < 0)
++ return pin;
++ if (slot->ro_gpio_low)
++ pin = !pin;
++ return pin;
++ } else {
++ return -ENOSYS;
++ }
++}
++
++static int octeon_mmc_get_cd(struct mmc_host *mmc)
++{
++ struct octeon_mmc_slot *slot = mmc_priv(mmc);
++
++ if (slot->cd_gpio >= 0) {
++ int pin = gpio_get_value_cansleep(slot->cd_gpio);
++
++ if (pin < 0)
++ return pin;
++ if (slot->cd_gpio_low)
++ pin = !pin;
++ return pin;
++ } else {
++ return -ENOSYS;
++ }
++}
++
++static const struct mmc_host_ops octeon_mmc_ops = {
++ .request = octeon_mmc_request,
++ .set_ios = octeon_mmc_set_ios,
++ .get_ro = octeon_mmc_get_ro,
++ .get_cd = octeon_mmc_get_cd,
++};
++
++static void octeon_mmc_set_clock(struct octeon_mmc_slot *slot,
++ unsigned int clock)
++{
++ struct mmc_host *mmc = slot->mmc;
++
++ clock = min(clock, mmc->f_max);
++ clock = max(clock, mmc->f_min);
++ slot->clock = clock;
++}
++
++static int octeon_mmc_initlowlevel(struct octeon_mmc_slot *slot,
++ int bus_width)
++{
++ union cvmx_mio_emm_switch emm_switch;
++ struct octeon_mmc_host *host = slot->host;
++
++ host->emm_cfg |= 1ull << slot->bus_id;
++ cvmx_write_csr(slot->host->base + OCT_MIO_EMM_CFG, host->emm_cfg);
++ octeon_mmc_set_clock(slot, 400000);
++
++ /* Program initial clock speed and power */
++ emm_switch.u64 = 0;
++ emm_switch.s.power_class = 10;
++ emm_switch.s.clk_hi = (slot->sclock / slot->clock) / 2;
++ emm_switch.s.clk_lo = (slot->sclock / slot->clock) / 2;
++
++ cvmx_write_csr(host->base + OCT_MIO_EMM_SWITCH, emm_switch.u64);
++ emm_switch.s.bus_id = slot->bus_id;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_SWITCH, emm_switch.u64);
++ slot->cached_switch = emm_switch.u64;
++
++ cvmx_write_csr(host->base + OCT_MIO_EMM_WDOG,
++ ((u64)slot->clock * 850ull) / 1000ull);
++ cvmx_write_csr(host->base + OCT_MIO_EMM_STS_MASK, 0xe4f90080ull);
++ cvmx_write_csr(host->base + OCT_MIO_EMM_RCA, 1);
++ return 0;
++}
++
++static int __init octeon_init_slot(struct octeon_mmc_host *host, int id,
++ int bus_width, int max_freq,
++ int ro_gpio, int cd_gpio, int pwr_gpio,
++ bool ro_low, bool cd_low, bool power_low,
++ u32 cmd_skew, u32 dat_skew)
++{
++ struct mmc_host *mmc;
++ struct octeon_mmc_slot *slot;
++ u64 clock_period;
++ int ret;
++
++ /*
++ * Allocate MMC structue
++ */
++ mmc = mmc_alloc_host(sizeof(struct octeon_mmc_slot), &host->pdev->dev);
++ if (!mmc) {
++ dev_err(&host->pdev->dev, "alloc host failed\n");
++ return -ENOMEM;
++ }
++
++ slot = mmc_priv(mmc);
++ slot->mmc = mmc;
++ slot->host = host;
++ slot->ro_gpio = ro_gpio;
++ slot->cd_gpio = cd_gpio;
++ slot->pwr_gpio = pwr_gpio;
++ slot->ro_gpio_low = ro_low;
++ slot->cd_gpio_low = cd_low;
++ slot->pwr_gpio_low = power_low;
++
++ if (slot->ro_gpio >= 0) {
++ ret = gpio_request(slot->ro_gpio, "mmc_ro");
++ if (ret) {
++ dev_err(&host->pdev->dev,
++ "Could not request mmc_ro GPIO %d\n",
++ slot->ro_gpio);
++ return ret;
++ }
++ gpio_direction_input(slot->ro_gpio);
++ }
++ if (slot->cd_gpio >= 0) {
++ ret = gpio_request(slot->cd_gpio, "mmc_card_detect");
++ if (ret) {
++ if (slot->ro_gpio >= 0)
++ gpio_free(slot->ro_gpio);
++ dev_err(&host->pdev->dev, "Could not request mmc_card_detect GPIO %d\n",
++ slot->cd_gpio);
++ return ret;
++ }
++ gpio_direction_input(slot->cd_gpio);
++ }
++ if (slot->pwr_gpio >= 0) {
++ ret = gpio_request(slot->pwr_gpio, "mmc_power");
++ if (ret) {
++ dev_err(&host->pdev->dev,
++ "Could not request mmc_power GPIO %d\n",
++ slot->pwr_gpio);
++ if (slot->ro_gpio >= 0)
++ gpio_free(slot->ro_gpio);
++ if (slot->cd_gpio)
++ gpio_free(slot->cd_gpio);
++ return ret;
++ }
++ octeon_mmc_dbg("%s: Shutting off power to slot %d via gpio %d\n",
++ DRV_NAME, slot->bus_id, slot->pwr_gpio);
++ gpio_direction_output(slot->pwr_gpio,
++ slot->pwr_gpio_low);
++ }
++ /*
++ * Set up host parameters.
++ */
++ mmc->ops = &octeon_mmc_ops;
++ mmc->f_min = 400000;
++ mmc->f_max = max_freq;
++ mmc->caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED |
++ MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA |
++ MMC_CAP_ERASE;
++ mmc->ocr_avail = MMC_VDD_27_28 | MMC_VDD_28_29 | MMC_VDD_29_30 |
++ MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33 |
++ MMC_VDD_33_34 | MMC_VDD_34_35 | MMC_VDD_35_36;
++
++ /* post-sdk23 caps */
++ mmc->caps |=
++ ((mmc->f_max >= 12000000) * MMC_CAP_UHS_SDR12) |
++ ((mmc->f_max >= 25000000) * MMC_CAP_UHS_SDR25) |
++ ((mmc->f_max >= 50000000) * MMC_CAP_UHS_SDR50) |
++ MMC_CAP_CMD23;
++
++ if (host->global_pwr_gpio >= 0)
++ mmc->caps |= MMC_CAP_POWER_OFF_CARD;
++
++ /* "1.8v" capability is actually 1.8-or-3.3v */
++ if (ddr)
++ mmc->caps |= MMC_CAP_UHS_DDR50 | MMC_CAP_1_8V_DDR;
++
++ mmc->max_segs = 64;
++ mmc->max_seg_size = host->linear_buf_size;
++ mmc->max_req_size = host->linear_buf_size;
++ mmc->max_blk_size = 512;
++ mmc->max_blk_count = mmc->max_req_size / 512;
++
++ slot->clock = mmc->f_min;
++ slot->sclock = octeon_get_io_clock_rate();
++
++ clock_period = 1000000000000ull / slot->sclock; /* period in pS */
++ slot->cmd_cnt = (cmd_skew + clock_period / 2) / clock_period;
++ slot->dat_cnt = (dat_skew + clock_period / 2) / clock_period;
++
++ slot->bus_width = bus_width;
++ slot->bus_id = id;
++ slot->cached_rca = 1;
++
++ /* Only a single user of the bootbus at a time. */
++ octeon_mmc_acquire_bus(host);
++ host->slot[id] = slot;
++
++ octeon_mmc_switch_to(slot);
++ /* Initialize MMC Block. */
++ octeon_mmc_initlowlevel(slot, bus_width);
++
++ octeon_mmc_release_bus(host);
++
++ ret = mmc_add_host(mmc);
++ octeon_mmc_dbg("mmc_add_host returned %d\n", ret);
++
++ return 0;
++}
++
++static int octeon_mmc_probe(struct platform_device *pdev)
++{
++ union cvmx_mio_emm_cfg emm_cfg;
++ struct octeon_mmc_host *host;
++ struct resource *res;
++ void __iomem *base;
++ int mmc_irq[9];
++ int i;
++ int ret = 0;
++ struct device_node *node = pdev->dev.of_node;
++ bool cn78xx_style;
++ u64 t;
++ enum of_gpio_flags f;
++
++ host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
++ if (!host)
++ return -ENOMEM;
++
++ spin_lock_init(&host->irq_handler_lock);
++ sema_init(&host->mmc_serializer, 1);
++
++ cn78xx_style = of_device_is_compatible(node, "cavium,octeon-7890-mmc");
++ if (cn78xx_style) {
++ host->need_bootbus_lock = false;
++ host->big_dma_addr = true;
++ host->need_irq_handler_lock = true;
++ /*
++ * First seven are the EMM_INT bits 0..6, then two for
++ * the EMM_DMA_INT bits
++ */
++ for (i = 0; i < 9; i++) {
++ mmc_irq[i] = platform_get_irq(pdev, i);
++ if (mmc_irq[i] < 0)
++ return mmc_irq[i];
++ }
++ } else {
++ host->need_bootbus_lock = true;
++ host->big_dma_addr = false;
++ host->need_irq_handler_lock = false;
++ /* First one is EMM second NDF_DMA */
++ for (i = 0; i < 2; i++) {
++ mmc_irq[i] = platform_get_irq(pdev, i);
++ if (mmc_irq[i] < 0)
++ return mmc_irq[i];
++ }
++ }
++ host->last_slot = -1;
++
++ if (bb_size < 512 || bb_size >= (1 << 24))
++ bb_size = 1 << 16;
++ host->linear_buf_size = bb_size;
++ host->linear_buf = devm_kzalloc(&pdev->dev, host->linear_buf_size,
++ GFP_KERNEL);
++
++ if (!host->linear_buf) {
++ dev_err(&pdev->dev, "devm_kzalloc failed\n");
++ return -ENOMEM;
++ }
++
++ host->pdev = pdev;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!res) {
++ dev_err(&pdev->dev, "Platform resource[0] is missing\n");
++ return -ENXIO;
++ }
++ base = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(base))
++ return PTR_ERR(base);
++ host->base = (u64)base;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
++ if (!res) {
++ dev_err(&pdev->dev, "Platform resource[1] is missing\n");
++ ret = -EINVAL;
++ goto err;
++ }
++ base = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(base)) {
++ ret = PTR_ERR(base);
++ goto err;
++ }
++ host->ndf_base = (u64)base;
++ /*
++ * Clear out any pending interrupts that may be left over from
++ * bootloader.
++ */
++ t = cvmx_read_csr(host->base + OCT_MIO_EMM_INT);
++ cvmx_write_csr(host->base + OCT_MIO_EMM_INT, t);
++ if (cn78xx_style) {
++ /* Only CMD_DONE, DMA_DONE, CMD_ERR, DMA_ERR */
++ for (i = 1; i <= 4; i++) {
++ ret = devm_request_irq(&pdev->dev, mmc_irq[i],
++ octeon_mmc_interrupt,
++ 0, DRV_NAME, host);
++ if (ret < 0) {
++ dev_err(&pdev->dev, "Error: devm_request_irq %d\n",
++ mmc_irq[i]);
++ goto err;
++ }
++ }
++ } else {
++ ret = devm_request_irq(&pdev->dev, mmc_irq[0],
++ octeon_mmc_interrupt, 0, DRV_NAME, host);
++ if (ret < 0) {
++ dev_err(&pdev->dev, "Error: devm_request_irq %d\n",
++ mmc_irq[0]);
++ goto err;
++ }
++ }
++
++ ret = of_get_named_gpio_flags(node, "power-gpios", 0, &f);
++ if (ret == -EPROBE_DEFER)
++ goto err;
++
++ host->global_pwr_gpio = ret;
++ host->global_pwr_gpio_low =
++ (host->global_pwr_gpio >= 0 && f == OF_GPIO_ACTIVE_LOW);
++
++ if (host->global_pwr_gpio >= 0) {
++ ret = gpio_request(host->global_pwr_gpio, "mmc global power");
++ if (ret) {
++ dev_err(&pdev->dev,
++ "Could not request mmc global power gpio %d\n",
++ host->global_pwr_gpio);
++ goto err;
++ }
++ dev_dbg(&pdev->dev, "Global power on\n");
++ gpio_direction_output(host->global_pwr_gpio,
++ !host->global_pwr_gpio_low);
++ }
++
++ platform_set_drvdata(pdev, host);
++
++ for_each_child_of_node(pdev->dev.of_node, node) {
++
++ int r;
++ u32 slot;
++ int ro_gpio, cd_gpio, pwr_gpio;
++ bool ro_low, cd_low, pwr_low;
++ u32 bus_width, max_freq, cmd_skew, dat_skew;
++
++ if (!of_device_is_compatible(node,
++ "cavium,octeon-6130-mmc-slot")) {
++ pr_warn("Sub node isn't slot: %s\n",
++ of_node_full_name(node));
++ continue;
++ }
++
++ if (of_property_read_u32(node, "reg", &slot) != 0) {
++ pr_warn("Missing or invalid reg property on %s\n",
++ of_node_full_name(node));
++ continue;
++ }
++
++ r = of_property_read_u32(node, "cavium,bus-max-width",
++ &bus_width);
++ if (r) {
++ bus_width = 8;
++ pr_info("Bus width not found for slot %d, defaulting to %d\n",
++ slot, bus_width);
++ } else {
++ switch (bus_width) {
++ case 1:
++ case 4:
++ case 8:
++ break;
++ default:
++ pr_warn("Invalid bus width property for slot %d\n",
++ slot);
++ continue;
++ }
++ }
++
++ r = of_property_read_u32(node, "cavium,cmd-clk-skew",
++ &cmd_skew);
++ if (r)
++ cmd_skew = 0;
++
++ r = of_property_read_u32(node, "cavium,dat-clk-skew",
++ &dat_skew);
++ if (r)
++ dat_skew = 0;
++
++ r = of_property_read_u32(node, "spi-max-frequency", &max_freq);
++ if (r) {
++ max_freq = 52000000;
++ pr_info("No spi-max-frequency for slot %d, defaulting to %d\n",
++ slot, max_freq);
++ }
++
++ ro_gpio = of_get_named_gpio_flags(node, "wp-gpios", 0, &f);
++ ro_low = (ro_gpio >= 0 && f == OF_GPIO_ACTIVE_LOW);
++ cd_gpio = of_get_named_gpio_flags(node, "cd-gpios", 0, &f);
++ cd_low = (cd_gpio >= 0 && f == OF_GPIO_ACTIVE_LOW);
++ pwr_gpio = of_get_named_gpio_flags(node, "power-gpios", 0, &f);
++ pwr_low = (pwr_gpio >= 0 && f == OF_GPIO_ACTIVE_LOW);
++
++ ret = octeon_init_slot(host, slot, bus_width, max_freq,
++ ro_gpio, cd_gpio, pwr_gpio,
++ ro_low, cd_low, pwr_low,
++ cmd_skew, dat_skew);
++ octeon_mmc_dbg("init slot %d, ret = %d\n", slot, ret);
++ if (ret)
++ goto err;
++ }
++
++ return ret;
++
++err:
++ dev_err(&pdev->dev, "Probe failed: %d\n", ret);
++
++ /* Disable MMC controller */
++ emm_cfg.s.bus_ena = 0;
++ cvmx_write_csr(host->base + OCT_MIO_EMM_CFG, emm_cfg.u64);
++
++ if (host->global_pwr_gpio >= 0) {
++ dev_dbg(&pdev->dev, "Global power off\n");
++ gpio_set_value_cansleep(host->global_pwr_gpio,
++ host->global_pwr_gpio_low);
++ gpio_free(host->global_pwr_gpio);
++ }
++
++ return ret;
++}
++
++static int octeon_mmc_remove(struct platform_device *pdev)
++{
++ union cvmx_mio_ndf_dma_cfg ndf_dma_cfg;
++ struct octeon_mmc_host *host = platform_get_drvdata(pdev);
++ struct octeon_mmc_slot *slot;
++
++ platform_set_drvdata(pdev, NULL);
++
++ if (host) {
++ int i;
++
++ /* quench all users */
++ for (i = 0; i < OCTEON_MAX_MMC; i++) {
++ slot = host->slot[i];
++ if (slot)
++ mmc_remove_host(slot->mmc);
++ }
++
++ /* Reset bus_id */
++ ndf_dma_cfg.u64 =
++ cvmx_read_csr(host->ndf_base + OCT_MIO_NDF_DMA_CFG);
++ ndf_dma_cfg.s.en = 0;
++ cvmx_write_csr(host->ndf_base + OCT_MIO_NDF_DMA_CFG,
++ ndf_dma_cfg.u64);
++
++ for (i = 0; i < OCTEON_MAX_MMC; i++) {
++ struct octeon_mmc_slot *slot;
++
++ slot = host->slot[i];
++ if (!slot)
++ continue;
++ /* Free the GPIOs */
++ if (slot->ro_gpio >= 0)
++ gpio_free(slot->ro_gpio);
++ if (slot->cd_gpio >= 0)
++ gpio_free(slot->cd_gpio);
++ if (slot->pwr_gpio >= 0) {
++ gpio_set_value_cansleep(slot->pwr_gpio,
++ slot->pwr_gpio_low);
++ gpio_free(slot->pwr_gpio);
++ }
++ }
++
++ if (host->global_pwr_gpio >= 0) {
++ dev_dbg(&pdev->dev, "Global power off\n");
++ gpio_set_value_cansleep(host->global_pwr_gpio,
++ host->global_pwr_gpio_low);
++ gpio_free(host->global_pwr_gpio);
++ }
++
++ for (i = 0; i < OCTEON_MAX_MMC; i++) {
++ slot = host->slot[i];
++ if (slot)
++ mmc_free_host(slot->mmc);
++ }
++
++ }
++ return 0;
++}
++
++static struct of_device_id octeon_mmc_match[] = {
++ {
++ .compatible = "cavium,octeon-6130-mmc",
++ },
++ {
++ .compatible = "cavium,octeon-7890-mmc",
++ },
++ {},
++};
++MODULE_DEVICE_TABLE(of, octeon_mmc_match);
++
++static struct platform_driver octeon_mmc_driver = {
++ .probe = octeon_mmc_probe,
++ .remove = octeon_mmc_remove,
++ .driver = {
++ .name = DRV_NAME,
++ .owner = THIS_MODULE,
++ .of_match_table = octeon_mmc_match,
++ },
++};
++
++static int __init octeon_mmc_init(void)
++{
++ int ret;
++
++ octeon_mmc_dbg("calling octeon_mmc_init\n");
++
++ ret = platform_driver_register(&octeon_mmc_driver);
++ octeon_mmc_dbg("driver probe returned %d\n", ret);
++
++ if (ret)
++ pr_err("%s: Failed to register driver\n", DRV_NAME);
++
++ return ret;
++}
++
++static void __exit octeon_mmc_cleanup(void)
++{
++ /* Unregister MMC driver */
++ platform_driver_unregister(&octeon_mmc_driver);
++}
++
++module_init(octeon_mmc_init);
++module_exit(octeon_mmc_cleanup);
++
++MODULE_AUTHOR("Cavium Inc. <support@cavium.com>");
++MODULE_DESCRIPTION("low-level driver for Cavium OCTEON MMC/SSD card");
++MODULE_LICENSE("GPL");
projects / openwrt / staging / ynezz.git / commitdiff