diff options
Diffstat (limited to 'target/linux/octeon/patches-3.18/150-mmc-octeon-add-host-driver-for-octeon-mmc-controller.patch')
| -rw-r--r-- | target/linux/octeon/patches-3.18/150-mmc-octeon-add-host-driver-for-octeon-mmc-controller.patch | 1632 |
1 files changed, 1632 insertions, 0 deletions
diff --git a/target/linux/octeon/patches-3.18/150-mmc-octeon-add-host-driver-for-octeon-mmc-controller.patch b/target/linux/octeon/patches-3.18/150-mmc-octeon-add-host-driver-for-octeon-mmc-controller.patch new file mode 100644 index 0000000000..f2e3b5841c --- /dev/null +++ b/target/linux/octeon/patches-3.18/150-mmc-octeon-add-host-driver-for-octeon-mmc-controller.patch @@ -0,0 +1,1632 @@ +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"); |