diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/mmc/tegra_mmc.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/mmc/tegra_mmc.c | 702 |
1 files changed, 0 insertions, 702 deletions
diff --git a/qemu/roms/u-boot/drivers/mmc/tegra_mmc.c b/qemu/roms/u-boot/drivers/mmc/tegra_mmc.c deleted file mode 100644 index ed67eec25..000000000 --- a/qemu/roms/u-boot/drivers/mmc/tegra_mmc.c +++ /dev/null @@ -1,702 +0,0 @@ -/* - * (C) Copyright 2009 SAMSUNG Electronics - * Minkyu Kang <mk7.kang@samsung.com> - * Jaehoon Chung <jh80.chung@samsung.com> - * Portions Copyright 2011-2013 NVIDIA Corporation - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <bouncebuf.h> -#include <common.h> -#include <asm/gpio.h> -#include <asm/io.h> -#include <asm/arch/clock.h> -#include <asm/arch-tegra/clk_rst.h> -#include <asm/arch-tegra/tegra_mmc.h> -#include <mmc.h> - -DECLARE_GLOBAL_DATA_PTR; - -struct mmc_host mmc_host[MAX_HOSTS]; - -#ifndef CONFIG_OF_CONTROL -#error "Please enable device tree support to use this driver" -#endif - -static void mmc_set_power(struct mmc_host *host, unsigned short power) -{ - u8 pwr = 0; - debug("%s: power = %x\n", __func__, power); - - if (power != (unsigned short)-1) { - switch (1 << power) { - case MMC_VDD_165_195: - pwr = TEGRA_MMC_PWRCTL_SD_BUS_VOLTAGE_V1_8; - break; - case MMC_VDD_29_30: - case MMC_VDD_30_31: - pwr = TEGRA_MMC_PWRCTL_SD_BUS_VOLTAGE_V3_0; - break; - case MMC_VDD_32_33: - case MMC_VDD_33_34: - pwr = TEGRA_MMC_PWRCTL_SD_BUS_VOLTAGE_V3_3; - break; - } - } - debug("%s: pwr = %X\n", __func__, pwr); - - /* Set the bus voltage first (if any) */ - writeb(pwr, &host->reg->pwrcon); - if (pwr == 0) - return; - - /* Now enable bus power */ - pwr |= TEGRA_MMC_PWRCTL_SD_BUS_POWER; - writeb(pwr, &host->reg->pwrcon); -} - -static void mmc_prepare_data(struct mmc_host *host, struct mmc_data *data, - struct bounce_buffer *bbstate) -{ - unsigned char ctrl; - - - debug("buf: %p (%p), data->blocks: %u, data->blocksize: %u\n", - bbstate->bounce_buffer, bbstate->user_buffer, data->blocks, - data->blocksize); - - writel((u32)bbstate->bounce_buffer, &host->reg->sysad); - /* - * DMASEL[4:3] - * 00 = Selects SDMA - * 01 = Reserved - * 10 = Selects 32-bit Address ADMA2 - * 11 = Selects 64-bit Address ADMA2 - */ - ctrl = readb(&host->reg->hostctl); - ctrl &= ~TEGRA_MMC_HOSTCTL_DMASEL_MASK; - ctrl |= TEGRA_MMC_HOSTCTL_DMASEL_SDMA; - writeb(ctrl, &host->reg->hostctl); - - /* We do not handle DMA boundaries, so set it to max (512 KiB) */ - writew((7 << 12) | (data->blocksize & 0xFFF), &host->reg->blksize); - writew(data->blocks, &host->reg->blkcnt); -} - -static void mmc_set_transfer_mode(struct mmc_host *host, struct mmc_data *data) -{ - unsigned short mode; - debug(" mmc_set_transfer_mode called\n"); - /* - * TRNMOD - * MUL1SIN0[5] : Multi/Single Block Select - * RD1WT0[4] : Data Transfer Direction Select - * 1 = read - * 0 = write - * ENACMD12[2] : Auto CMD12 Enable - * ENBLKCNT[1] : Block Count Enable - * ENDMA[0] : DMA Enable - */ - mode = (TEGRA_MMC_TRNMOD_DMA_ENABLE | - TEGRA_MMC_TRNMOD_BLOCK_COUNT_ENABLE); - - if (data->blocks > 1) - mode |= TEGRA_MMC_TRNMOD_MULTI_BLOCK_SELECT; - - if (data->flags & MMC_DATA_READ) - mode |= TEGRA_MMC_TRNMOD_DATA_XFER_DIR_SEL_READ; - - writew(mode, &host->reg->trnmod); -} - -static int mmc_wait_inhibit(struct mmc_host *host, - struct mmc_cmd *cmd, - struct mmc_data *data, - unsigned int timeout) -{ - /* - * PRNSTS - * CMDINHDAT[1] : Command Inhibit (DAT) - * CMDINHCMD[0] : Command Inhibit (CMD) - */ - unsigned int mask = TEGRA_MMC_PRNSTS_CMD_INHIBIT_CMD; - - /* - * We shouldn't wait for data inhibit for stop commands, even - * though they might use busy signaling - */ - if ((data == NULL) && (cmd->resp_type & MMC_RSP_BUSY)) - mask |= TEGRA_MMC_PRNSTS_CMD_INHIBIT_DAT; - - while (readl(&host->reg->prnsts) & mask) { - if (timeout == 0) { - printf("%s: timeout error\n", __func__); - return -1; - } - timeout--; - udelay(1000); - } - - return 0; -} - -static int mmc_send_cmd_bounced(struct mmc *mmc, struct mmc_cmd *cmd, - struct mmc_data *data, struct bounce_buffer *bbstate) -{ - struct mmc_host *host = mmc->priv; - int flags, i; - int result; - unsigned int mask = 0; - unsigned int retry = 0x100000; - debug(" mmc_send_cmd called\n"); - - result = mmc_wait_inhibit(host, cmd, data, 10 /* ms */); - - if (result < 0) - return result; - - if (data) - mmc_prepare_data(host, data, bbstate); - - debug("cmd->arg: %08x\n", cmd->cmdarg); - writel(cmd->cmdarg, &host->reg->argument); - - if (data) - mmc_set_transfer_mode(host, data); - - if ((cmd->resp_type & MMC_RSP_136) && (cmd->resp_type & MMC_RSP_BUSY)) - return -1; - - /* - * CMDREG - * CMDIDX[13:8] : Command index - * DATAPRNT[5] : Data Present Select - * ENCMDIDX[4] : Command Index Check Enable - * ENCMDCRC[3] : Command CRC Check Enable - * RSPTYP[1:0] - * 00 = No Response - * 01 = Length 136 - * 10 = Length 48 - * 11 = Length 48 Check busy after response - */ - if (!(cmd->resp_type & MMC_RSP_PRESENT)) - flags = TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_NO_RESPONSE; - else if (cmd->resp_type & MMC_RSP_136) - flags = TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_136; - else if (cmd->resp_type & MMC_RSP_BUSY) - flags = TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_48_BUSY; - else - flags = TEGRA_MMC_CMDREG_RESP_TYPE_SELECT_LENGTH_48; - - if (cmd->resp_type & MMC_RSP_CRC) - flags |= TEGRA_MMC_TRNMOD_CMD_CRC_CHECK; - if (cmd->resp_type & MMC_RSP_OPCODE) - flags |= TEGRA_MMC_TRNMOD_CMD_INDEX_CHECK; - if (data) - flags |= TEGRA_MMC_TRNMOD_DATA_PRESENT_SELECT_DATA_TRANSFER; - - debug("cmd: %d\n", cmd->cmdidx); - - writew((cmd->cmdidx << 8) | flags, &host->reg->cmdreg); - - for (i = 0; i < retry; i++) { - mask = readl(&host->reg->norintsts); - /* Command Complete */ - if (mask & TEGRA_MMC_NORINTSTS_CMD_COMPLETE) { - if (!data) - writel(mask, &host->reg->norintsts); - break; - } - } - - if (i == retry) { - printf("%s: waiting for status update\n", __func__); - writel(mask, &host->reg->norintsts); - return TIMEOUT; - } - - if (mask & TEGRA_MMC_NORINTSTS_CMD_TIMEOUT) { - /* Timeout Error */ - debug("timeout: %08x cmd %d\n", mask, cmd->cmdidx); - writel(mask, &host->reg->norintsts); - return TIMEOUT; - } else if (mask & TEGRA_MMC_NORINTSTS_ERR_INTERRUPT) { - /* Error Interrupt */ - debug("error: %08x cmd %d\n", mask, cmd->cmdidx); - writel(mask, &host->reg->norintsts); - return -1; - } - - if (cmd->resp_type & MMC_RSP_PRESENT) { - if (cmd->resp_type & MMC_RSP_136) { - /* CRC is stripped so we need to do some shifting. */ - for (i = 0; i < 4; i++) { - unsigned int offset = - (unsigned int)(&host->reg->rspreg3 - i); - cmd->response[i] = readl(offset) << 8; - - if (i != 3) { - cmd->response[i] |= - readb(offset - 1); - } - debug("cmd->resp[%d]: %08x\n", - i, cmd->response[i]); - } - } else if (cmd->resp_type & MMC_RSP_BUSY) { - for (i = 0; i < retry; i++) { - /* PRNTDATA[23:20] : DAT[3:0] Line Signal */ - if (readl(&host->reg->prnsts) - & (1 << 20)) /* DAT[0] */ - break; - } - - if (i == retry) { - printf("%s: card is still busy\n", __func__); - writel(mask, &host->reg->norintsts); - return TIMEOUT; - } - - cmd->response[0] = readl(&host->reg->rspreg0); - debug("cmd->resp[0]: %08x\n", cmd->response[0]); - } else { - cmd->response[0] = readl(&host->reg->rspreg0); - debug("cmd->resp[0]: %08x\n", cmd->response[0]); - } - } - - if (data) { - unsigned long start = get_timer(0); - - while (1) { - mask = readl(&host->reg->norintsts); - - if (mask & TEGRA_MMC_NORINTSTS_ERR_INTERRUPT) { - /* Error Interrupt */ - writel(mask, &host->reg->norintsts); - printf("%s: error during transfer: 0x%08x\n", - __func__, mask); - return -1; - } else if (mask & TEGRA_MMC_NORINTSTS_DMA_INTERRUPT) { - /* - * DMA Interrupt, restart the transfer where - * it was interrupted. - */ - unsigned int address = readl(&host->reg->sysad); - - debug("DMA end\n"); - writel(TEGRA_MMC_NORINTSTS_DMA_INTERRUPT, - &host->reg->norintsts); - writel(address, &host->reg->sysad); - } else if (mask & TEGRA_MMC_NORINTSTS_XFER_COMPLETE) { - /* Transfer Complete */ - debug("r/w is done\n"); - break; - } else if (get_timer(start) > 2000UL) { - writel(mask, &host->reg->norintsts); - printf("%s: MMC Timeout\n" - " Interrupt status 0x%08x\n" - " Interrupt status enable 0x%08x\n" - " Interrupt signal enable 0x%08x\n" - " Present status 0x%08x\n", - __func__, mask, - readl(&host->reg->norintstsen), - readl(&host->reg->norintsigen), - readl(&host->reg->prnsts)); - return -1; - } - } - writel(mask, &host->reg->norintsts); - } - - udelay(1000); - return 0; -} - -static int tegra_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, - struct mmc_data *data) -{ - void *buf; - unsigned int bbflags; - size_t len; - struct bounce_buffer bbstate; - int ret; - - if (data) { - if (data->flags & MMC_DATA_READ) { - buf = data->dest; - bbflags = GEN_BB_WRITE; - } else { - buf = (void *)data->src; - bbflags = GEN_BB_READ; - } - len = data->blocks * data->blocksize; - - bounce_buffer_start(&bbstate, buf, len, bbflags); - } - - ret = mmc_send_cmd_bounced(mmc, cmd, data, &bbstate); - - if (data) - bounce_buffer_stop(&bbstate); - - return ret; -} - -static void mmc_change_clock(struct mmc_host *host, uint clock) -{ - int div; - unsigned short clk; - unsigned long timeout; - - debug(" mmc_change_clock called\n"); - - /* - * Change Tegra SDMMCx clock divisor here. Source is PLLP_OUT0 - */ - if (clock == 0) - goto out; - clock_adjust_periph_pll_div(host->mmc_id, CLOCK_ID_PERIPH, clock, - &div); - debug("div = %d\n", div); - - writew(0, &host->reg->clkcon); - - /* - * CLKCON - * SELFREQ[15:8] : base clock divided by value - * ENSDCLK[2] : SD Clock Enable - * STBLINTCLK[1] : Internal Clock Stable - * ENINTCLK[0] : Internal Clock Enable - */ - div >>= 1; - clk = ((div << TEGRA_MMC_CLKCON_SDCLK_FREQ_SEL_SHIFT) | - TEGRA_MMC_CLKCON_INTERNAL_CLOCK_ENABLE); - writew(clk, &host->reg->clkcon); - - /* Wait max 10 ms */ - timeout = 10; - while (!(readw(&host->reg->clkcon) & - TEGRA_MMC_CLKCON_INTERNAL_CLOCK_STABLE)) { - if (timeout == 0) { - printf("%s: timeout error\n", __func__); - return; - } - timeout--; - udelay(1000); - } - - clk |= TEGRA_MMC_CLKCON_SD_CLOCK_ENABLE; - writew(clk, &host->reg->clkcon); - - debug("mmc_change_clock: clkcon = %08X\n", clk); - -out: - host->clock = clock; -} - -static void tegra_mmc_set_ios(struct mmc *mmc) -{ - struct mmc_host *host = mmc->priv; - unsigned char ctrl; - debug(" mmc_set_ios called\n"); - - debug("bus_width: %x, clock: %d\n", mmc->bus_width, mmc->clock); - - /* Change clock first */ - mmc_change_clock(host, mmc->clock); - - ctrl = readb(&host->reg->hostctl); - - /* - * WIDE8[5] - * 0 = Depend on WIDE4 - * 1 = 8-bit mode - * WIDE4[1] - * 1 = 4-bit mode - * 0 = 1-bit mode - */ - if (mmc->bus_width == 8) - ctrl |= (1 << 5); - else if (mmc->bus_width == 4) - ctrl |= (1 << 1); - else - ctrl &= ~(1 << 1); - - writeb(ctrl, &host->reg->hostctl); - debug("mmc_set_ios: hostctl = %08X\n", ctrl); -} - -static void mmc_reset(struct mmc_host *host, struct mmc *mmc) -{ - unsigned int timeout; - debug(" mmc_reset called\n"); - - /* - * RSTALL[0] : Software reset for all - * 1 = reset - * 0 = work - */ - writeb(TEGRA_MMC_SWRST_SW_RESET_FOR_ALL, &host->reg->swrst); - - host->clock = 0; - - /* Wait max 100 ms */ - timeout = 100; - - /* hw clears the bit when it's done */ - while (readb(&host->reg->swrst) & TEGRA_MMC_SWRST_SW_RESET_FOR_ALL) { - if (timeout == 0) { - printf("%s: timeout error\n", __func__); - return; - } - timeout--; - udelay(1000); - } - - /* Set SD bus voltage & enable bus power */ - mmc_set_power(host, fls(mmc->cfg->voltages) - 1); - debug("%s: power control = %02X, host control = %02X\n", __func__, - readb(&host->reg->pwrcon), readb(&host->reg->hostctl)); - - /* Make sure SDIO pads are set up */ - pad_init_mmc(host); -} - -static int tegra_mmc_core_init(struct mmc *mmc) -{ - struct mmc_host *host = mmc->priv; - unsigned int mask; - debug(" mmc_core_init called\n"); - - mmc_reset(host, mmc); - - host->version = readw(&host->reg->hcver); - debug("host version = %x\n", host->version); - - /* mask all */ - writel(0xffffffff, &host->reg->norintstsen); - writel(0xffffffff, &host->reg->norintsigen); - - writeb(0xe, &host->reg->timeoutcon); /* TMCLK * 2^27 */ - /* - * NORMAL Interrupt Status Enable Register init - * [5] ENSTABUFRDRDY : Buffer Read Ready Status Enable - * [4] ENSTABUFWTRDY : Buffer write Ready Status Enable - * [3] ENSTADMAINT : DMA boundary interrupt - * [1] ENSTASTANSCMPLT : Transfre Complete Status Enable - * [0] ENSTACMDCMPLT : Command Complete Status Enable - */ - mask = readl(&host->reg->norintstsen); - mask &= ~(0xffff); - mask |= (TEGRA_MMC_NORINTSTSEN_CMD_COMPLETE | - TEGRA_MMC_NORINTSTSEN_XFER_COMPLETE | - TEGRA_MMC_NORINTSTSEN_DMA_INTERRUPT | - TEGRA_MMC_NORINTSTSEN_BUFFER_WRITE_READY | - TEGRA_MMC_NORINTSTSEN_BUFFER_READ_READY); - writel(mask, &host->reg->norintstsen); - - /* - * NORMAL Interrupt Signal Enable Register init - * [1] ENSTACMDCMPLT : Transfer Complete Signal Enable - */ - mask = readl(&host->reg->norintsigen); - mask &= ~(0xffff); - mask |= TEGRA_MMC_NORINTSIGEN_XFER_COMPLETE; - writel(mask, &host->reg->norintsigen); - - return 0; -} - -int tegra_mmc_getcd(struct mmc *mmc) -{ - struct mmc_host *host = mmc->priv; - - debug("tegra_mmc_getcd called\n"); - - if (fdt_gpio_isvalid(&host->cd_gpio)) - return fdtdec_get_gpio(&host->cd_gpio); - - return 1; -} - -static const struct mmc_ops tegra_mmc_ops = { - .send_cmd = tegra_mmc_send_cmd, - .set_ios = tegra_mmc_set_ios, - .init = tegra_mmc_core_init, - .getcd = tegra_mmc_getcd, -}; - -static int do_mmc_init(int dev_index) -{ - struct mmc_host *host; - char gpusage[12]; /* "SD/MMCn PWR" or "SD/MMCn CD" */ - struct mmc *mmc; - - /* DT should have been read & host config filled in */ - host = &mmc_host[dev_index]; - if (!host->enabled) - return -1; - - debug(" do_mmc_init: index %d, bus width %d " - "pwr_gpio %d cd_gpio %d\n", - dev_index, host->width, - host->pwr_gpio.gpio, host->cd_gpio.gpio); - - host->clock = 0; - clock_start_periph_pll(host->mmc_id, CLOCK_ID_PERIPH, 20000000); - - if (fdt_gpio_isvalid(&host->pwr_gpio)) { - sprintf(gpusage, "SD/MMC%d PWR", dev_index); - gpio_request(host->pwr_gpio.gpio, gpusage); - gpio_direction_output(host->pwr_gpio.gpio, 1); - debug(" Power GPIO name = %s\n", host->pwr_gpio.name); - } - - if (fdt_gpio_isvalid(&host->cd_gpio)) { - sprintf(gpusage, "SD/MMC%d CD", dev_index); - gpio_request(host->cd_gpio.gpio, gpusage); - gpio_direction_input(host->cd_gpio.gpio); - debug(" CD GPIO name = %s\n", host->cd_gpio.name); - } - - memset(&host->cfg, 0, sizeof(host->cfg)); - - host->cfg.name = "Tegra SD/MMC"; - host->cfg.ops = &tegra_mmc_ops; - - host->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; - host->cfg.host_caps = 0; - if (host->width == 8) - host->cfg.host_caps |= MMC_MODE_8BIT; - if (host->width >= 4) - host->cfg.host_caps |= MMC_MODE_4BIT; - host->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_HC; - - /* - * min freq is for card identification, and is the highest - * low-speed SDIO card frequency (actually 400KHz) - * max freq is highest HS eMMC clock as per the SD/MMC spec - * (actually 52MHz) - */ - host->cfg.f_min = 375000; - host->cfg.f_max = 48000000; - - host->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; - - mmc = mmc_create(&host->cfg, host); - if (mmc == NULL) - return -1; - - return 0; -} - -/** - * Get the host address and peripheral ID for a node. - * - * @param blob fdt blob - * @param node Device index (0-3) - * @param host Structure to fill in (reg, width, mmc_id) - */ -static int mmc_get_config(const void *blob, int node, struct mmc_host *host) -{ - debug("%s: node = %d\n", __func__, node); - - host->enabled = fdtdec_get_is_enabled(blob, node); - - host->reg = (struct tegra_mmc *)fdtdec_get_addr(blob, node, "reg"); - if ((fdt_addr_t)host->reg == FDT_ADDR_T_NONE) { - debug("%s: no sdmmc base reg info found\n", __func__); - return -FDT_ERR_NOTFOUND; - } - - host->mmc_id = clock_decode_periph_id(blob, node); - if (host->mmc_id == PERIPH_ID_NONE) { - debug("%s: could not decode periph id\n", __func__); - return -FDT_ERR_NOTFOUND; - } - - /* - * NOTE: mmc->bus_width is determined by mmc.c dynamically. - * TBD: Override it with this value? - */ - host->width = fdtdec_get_int(blob, node, "bus-width", 0); - if (!host->width) - debug("%s: no sdmmc width found\n", __func__); - - /* These GPIOs are optional */ - fdtdec_decode_gpio(blob, node, "cd-gpios", &host->cd_gpio); - fdtdec_decode_gpio(blob, node, "wp-gpios", &host->wp_gpio); - fdtdec_decode_gpio(blob, node, "power-gpios", &host->pwr_gpio); - - debug("%s: found controller at %p, width = %d, periph_id = %d\n", - __func__, host->reg, host->width, host->mmc_id); - return 0; -} - -/* - * Process a list of nodes, adding them to our list of SDMMC ports. - * - * @param blob fdt blob - * @param node_list list of nodes to process (any <=0 are ignored) - * @param count number of nodes to process - * @return 0 if ok, -1 on error - */ -static int process_nodes(const void *blob, int node_list[], int count) -{ - struct mmc_host *host; - int i, node; - - debug("%s: count = %d\n", __func__, count); - - /* build mmc_host[] for each controller */ - for (i = 0; i < count; i++) { - node = node_list[i]; - if (node <= 0) - continue; - - host = &mmc_host[i]; - host->id = i; - - if (mmc_get_config(blob, node, host)) { - printf("%s: failed to decode dev %d\n", __func__, i); - return -1; - } - do_mmc_init(i); - } - return 0; -} - -void tegra_mmc_init(void) -{ - int node_list[MAX_HOSTS], count; - const void *blob = gd->fdt_blob; - debug("%s entry\n", __func__); - - /* See if any Tegra124 MMC controllers are present */ - count = fdtdec_find_aliases_for_id(blob, "sdhci", - COMPAT_NVIDIA_TEGRA124_SDMMC, node_list, MAX_HOSTS); - debug("%s: count of Tegra124 sdhci nodes is %d\n", __func__, count); - if (process_nodes(blob, node_list, count)) { - printf("%s: Error processing T30 mmc node(s)!\n", __func__); - return; - } - - /* See if any Tegra30 MMC controllers are present */ - count = fdtdec_find_aliases_for_id(blob, "sdhci", - COMPAT_NVIDIA_TEGRA30_SDMMC, node_list, MAX_HOSTS); - debug("%s: count of T30 sdhci nodes is %d\n", __func__, count); - if (process_nodes(blob, node_list, count)) { - printf("%s: Error processing T30 mmc node(s)!\n", __func__); - return; - } - - /* Now look for any Tegra20 MMC controllers */ - count = fdtdec_find_aliases_for_id(blob, "sdhci", - COMPAT_NVIDIA_TEGRA20_SDMMC, node_list, MAX_HOSTS); - debug("%s: count of T20 sdhci nodes is %d\n", __func__, count); - if (process_nodes(blob, node_list, count)) { - printf("%s: Error processing T20 mmc node(s)!\n", __func__); - return; - } -} |