diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/mmc/gen_atmel_mci.c')
-rw-r--r-- | qemu/roms/u-boot/drivers/mmc/gen_atmel_mci.c | 401 |
1 files changed, 0 insertions, 401 deletions
diff --git a/qemu/roms/u-boot/drivers/mmc/gen_atmel_mci.c b/qemu/roms/u-boot/drivers/mmc/gen_atmel_mci.c deleted file mode 100644 index acca0269e..000000000 --- a/qemu/roms/u-boot/drivers/mmc/gen_atmel_mci.c +++ /dev/null @@ -1,401 +0,0 @@ -/* - * Copyright (C) 2010 - * Rob Emanuele <rob@emanuele.us> - * Reinhard Meyer, EMK Elektronik <reinhard.meyer@emk-elektronik.de> - * - * Original Driver: - * Copyright (C) 2004-2006 Atmel Corporation - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <mmc.h> -#include <part.h> -#include <malloc.h> -#include <asm/io.h> -#include <asm/errno.h> -#include <asm/byteorder.h> -#include <asm/arch/clk.h> -#include <asm/arch/hardware.h> -#include "atmel_mci.h" - -#ifndef CONFIG_SYS_MMC_CLK_OD -# define CONFIG_SYS_MMC_CLK_OD 150000 -#endif - -#define MMC_DEFAULT_BLKLEN 512 - -#if defined(CONFIG_ATMEL_MCI_PORTB) -# define MCI_BUS 1 -#else -# define MCI_BUS 0 -#endif - -static int initialized = 0; - -/* Read Atmel MCI IP version */ -static unsigned int atmel_mci_get_version(struct atmel_mci *mci) -{ - return readl(&mci->version) & 0x00000fff; -} - -/* - * Print command and status: - * - * - always when DEBUG is defined - * - on command errors - */ -static void dump_cmd(u32 cmdr, u32 arg, u32 status, const char* msg) -{ - printf("gen_atmel_mci: CMDR %08x (%2u) ARGR %08x (SR: %08x) %s\n", - cmdr, cmdr&0x3F, arg, status, msg); -} - -/* Setup for MCI Clock and Block Size */ -static void mci_set_mode(struct mmc *mmc, u32 hz, u32 blklen) -{ - atmel_mci_t *mci = mmc->priv; - u32 bus_hz = get_mci_clk_rate(); - u32 clkdiv = 255; - - debug("mci: bus_hz is %u, setting clock %u Hz, block size %u\n", - bus_hz, hz, blklen); - if (hz > 0) { - /* find lowest clkdiv yielding a rate <= than requested */ - for (clkdiv=0; clkdiv<255; clkdiv++) { - if ((bus_hz / (clkdiv+1) / 2) <= hz) - break; - } - } - printf("mci: setting clock %u Hz, block size %u\n", - (bus_hz / (clkdiv+1)) / 2, blklen); - - blklen &= 0xfffc; - /* On some platforms RDPROOF and WRPROOF are ignored */ - writel((MMCI_BF(CLKDIV, clkdiv) - | MMCI_BF(BLKLEN, blklen) - | MMCI_BIT(RDPROOF) - | MMCI_BIT(WRPROOF)), &mci->mr); - /* - * On some new platforms BLKLEN in mci->mr is ignored. - * Should use the BLKLEN in the block register. - */ - writel(MMCI_BF(BLKLEN, blklen), &mci->blkr); - initialized = 1; -} - -/* Return the CMDR with flags for a given command and data packet */ -static u32 mci_encode_cmd( - struct mmc_cmd *cmd, struct mmc_data *data, u32* error_flags) -{ - u32 cmdr = 0; - - /* Default Flags for Errors */ - *error_flags |= (MMCI_BIT(DTOE) | MMCI_BIT(RDIRE) | MMCI_BIT(RENDE) | - MMCI_BIT(RINDE) | MMCI_BIT(RTOE)); - - /* Default Flags for the Command */ - cmdr |= MMCI_BIT(MAXLAT); - - if (data) { - cmdr |= MMCI_BF(TRCMD, 1); - if (data->blocks > 1) - cmdr |= MMCI_BF(TRTYP, 1); - if (data->flags & MMC_DATA_READ) - cmdr |= MMCI_BIT(TRDIR); - } - - if (cmd->resp_type & MMC_RSP_CRC) - *error_flags |= MMCI_BIT(RCRCE); - if (cmd->resp_type & MMC_RSP_136) - cmdr |= MMCI_BF(RSPTYP, 2); - else if (cmd->resp_type & MMC_RSP_BUSY) - cmdr |= MMCI_BF(RSPTYP, 3); - else if (cmd->resp_type & MMC_RSP_PRESENT) - cmdr |= MMCI_BF(RSPTYP, 1); - - return cmdr | MMCI_BF(CMDNB, cmd->cmdidx); -} - -/* Entered into function pointer in mci_send_cmd */ -static u32 mci_data_read(atmel_mci_t *mci, u32* data, u32 error_flags) -{ - u32 status; - - do { - status = readl(&mci->sr); - if (status & (error_flags | MMCI_BIT(OVRE))) - goto io_fail; - } while (!(status & MMCI_BIT(RXRDY))); - - if (status & MMCI_BIT(RXRDY)) { - *data = readl(&mci->rdr); - status = 0; - } -io_fail: - return status; -} - -/* Entered into function pointer in mci_send_cmd */ -static u32 mci_data_write(atmel_mci_t *mci, u32* data, u32 error_flags) -{ - u32 status; - - do { - status = readl(&mci->sr); - if (status & (error_flags | MMCI_BIT(UNRE))) - goto io_fail; - } while (!(status & MMCI_BIT(TXRDY))); - - if (status & MMCI_BIT(TXRDY)) { - writel(*data, &mci->tdr); - status = 0; - } -io_fail: - return status; -} - -/* - * Entered into mmc structure during driver init - * - * Sends a command out on the bus and deals with the block data. - * Takes the mmc pointer, a command pointer, and an optional data pointer. - */ -static int -mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) -{ - atmel_mci_t *mci = mmc->priv; - u32 cmdr; - u32 error_flags = 0; - u32 status; - - if (!initialized) { - puts ("MCI not initialized!\n"); - return COMM_ERR; - } - - /* Figure out the transfer arguments */ - cmdr = mci_encode_cmd(cmd, data, &error_flags); - - /* For multi blocks read/write, set the block register */ - if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) - || (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) - writel(data->blocks | MMCI_BF(BLKLEN, mmc->read_bl_len), - &mci->blkr); - - /* Send the command */ - writel(cmd->cmdarg, &mci->argr); - writel(cmdr, &mci->cmdr); - -#ifdef DEBUG - dump_cmd(cmdr, cmd->cmdarg, 0, "DEBUG"); -#endif - - /* Wait for the command to complete */ - while (!((status = readl(&mci->sr)) & MMCI_BIT(CMDRDY))); - - if ((status & error_flags) & MMCI_BIT(RTOE)) { - dump_cmd(cmdr, cmd->cmdarg, status, "Command Time Out"); - return TIMEOUT; - } else if (status & error_flags) { - dump_cmd(cmdr, cmd->cmdarg, status, "Command Failed"); - return COMM_ERR; - } - - /* Copy the response to the response buffer */ - if (cmd->resp_type & MMC_RSP_136) { - cmd->response[0] = readl(&mci->rspr); - cmd->response[1] = readl(&mci->rspr1); - cmd->response[2] = readl(&mci->rspr2); - cmd->response[3] = readl(&mci->rspr3); - } else - cmd->response[0] = readl(&mci->rspr); - - /* transfer all of the blocks */ - if (data) { - u32 word_count, block_count; - u32* ioptr; - u32 sys_blocksize, dummy, i; - u32 (*mci_data_op) - (atmel_mci_t *mci, u32* data, u32 error_flags); - - if (data->flags & MMC_DATA_READ) { - mci_data_op = mci_data_read; - sys_blocksize = mmc->read_bl_len; - ioptr = (u32*)data->dest; - } else { - mci_data_op = mci_data_write; - sys_blocksize = mmc->write_bl_len; - ioptr = (u32*)data->src; - } - - status = 0; - for (block_count = 0; - block_count < data->blocks && !status; - block_count++) { - word_count = 0; - do { - status = mci_data_op(mci, ioptr, error_flags); - word_count++; - ioptr++; - } while (!status && word_count < (data->blocksize/4)); -#ifdef DEBUG - if (data->flags & MMC_DATA_READ) - { - printf("Read Data:\n"); - print_buffer(0, data->dest, 1, - word_count*4, 0); - } -#endif -#ifdef DEBUG - if (!status && word_count < (sys_blocksize / 4)) - printf("filling rest of block...\n"); -#endif - /* fill the rest of a full block */ - while (!status && word_count < (sys_blocksize / 4)) { - status = mci_data_op(mci, &dummy, - error_flags); - word_count++; - } - if (status) { - dump_cmd(cmdr, cmd->cmdarg, status, - "Data Transfer Failed"); - return COMM_ERR; - } - } - - /* Wait for Transfer End */ - i = 0; - do { - status = readl(&mci->sr); - - if (status & error_flags) { - dump_cmd(cmdr, cmd->cmdarg, status, - "DTIP Wait Failed"); - return COMM_ERR; - } - i++; - } while ((status & MMCI_BIT(DTIP)) && i < 10000); - if (status & MMCI_BIT(DTIP)) { - dump_cmd(cmdr, cmd->cmdarg, status, - "XFER DTIP never unset, ignoring"); - } - } - - return 0; -} - -/* Entered into mmc structure during driver init */ -static void mci_set_ios(struct mmc *mmc) -{ - atmel_mci_t *mci = mmc->priv; - int bus_width = mmc->bus_width; - unsigned int version = atmel_mci_get_version(mci); - int busw; - - /* Set the clock speed */ - mci_set_mode(mmc, mmc->clock, MMC_DEFAULT_BLKLEN); - - /* - * set the bus width and select slot for this interface - * there is no capability for multiple slots on the same interface yet - */ - if ((version & 0xf00) >= 0x300) { - switch (bus_width) { - case 8: - busw = 3; - break; - case 4: - busw = 2; - break; - default: - busw = 0; - break; - } - - writel(busw << 6 | MMCI_BF(SCDSEL, MCI_BUS), &mci->sdcr); - } else { - busw = (bus_width == 4) ? 1 : 0; - - writel(busw << 7 | MMCI_BF(SCDSEL, MCI_BUS), &mci->sdcr); - } -} - -/* Entered into mmc structure during driver init */ -static int mci_init(struct mmc *mmc) -{ - atmel_mci_t *mci = mmc->priv; - - /* Initialize controller */ - writel(MMCI_BIT(SWRST), &mci->cr); /* soft reset */ - writel(MMCI_BIT(PWSDIS), &mci->cr); /* disable power save */ - writel(MMCI_BIT(MCIEN), &mci->cr); /* enable mci */ - writel(MMCI_BF(SCDSEL, MCI_BUS), &mci->sdcr); /* select port */ - - /* This delay can be optimized, but stick with max value */ - writel(0x7f, &mci->dtor); - /* Disable Interrupts */ - writel(~0UL, &mci->idr); - - /* Set default clocks and blocklen */ - mci_set_mode(mmc, CONFIG_SYS_MMC_CLK_OD, MMC_DEFAULT_BLKLEN); - - return 0; -} - -static const struct mmc_ops atmel_mci_ops = { - .send_cmd = mci_send_cmd, - .set_ios = mci_set_ios, - .init = mci_init, -}; - -/* - * This is the only exported function - * - * Call it with the MCI register base address - */ -int atmel_mci_init(void *regs) -{ - struct mmc *mmc; - struct mmc_config *cfg; - struct atmel_mci *mci; - unsigned int version; - - cfg = malloc(sizeof(*cfg)); - if (cfg == NULL) - return -1; - memset(cfg, 0, sizeof(*cfg)); - - mci = (struct atmel_mci *)regs; - - cfg->name = "mci"; - cfg->ops = &atmel_mci_ops; - - /* need to be able to pass these in on a board by board basis */ - cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; - version = atmel_mci_get_version(mci); - if ((version & 0xf00) >= 0x300) - cfg->host_caps = MMC_MODE_8BIT; - - cfg->host_caps |= MMC_MODE_4BIT; - - /* - * min and max frequencies determined by - * max and min of clock divider - */ - cfg->f_min = get_mci_clk_rate() / (2*256); - cfg->f_max = get_mci_clk_rate() / (2*1); - - cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; - - mmc = mmc_create(cfg, regs); - - if (mmc == NULL) { - free(cfg); - return -1; - } - /* NOTE: possibly leaking the cfg structure */ - - return 0; -} |